Computer programming#Hello world

The following is a list of Hello, world! programs.

Hello, world! programs make the text "Hello, world!" appear on a computer screen. It is usually the first program encountered when learning a programming language. Otherwise, it's a basic sanity check for an installation of a new programming language. If "Hello World" does not run, one must not try to develop complex programs before fixing the issues with the installation.

For even more languages have a look at the Hello World Collection.

## Contents

* 1 4DOS batch
* 2 Ingres 4GL
* 3 ABAP/4 - SAP AG
* 4 ABAP Objects (NetWeaver 7)
* 5 ABC
* 6 ActionScript
* 6.1 ActionScript 1.0 and 2.0
* 6.2 ActionScript 3
* 7 Ada
* 8 ALGOL 68
* 9 AmigaE
* 10 AMX NetLinx
* 11 ANT
* 12 APL
* 13 AppleScript
* 14 ASP
* 14.1 ASP.NET
* 15 Assembly language
* 15.1 Accumulator-only architecture: DEC PDP-8, PAL-III assembler
* 15.2 First successful uP/OS combinations: Intel 8080/Zilog Z80, CP/M, RMAC assembler
* 15.3 Popular home computer: ZX Spectrum, Zilog Z80, HiSoft GENS assembler
* 15.4 Accumulator + index register machine: MOS Technology 6502, CBM KERNEL, MOS assembler syntax
* 15.5 Accumulator/Index microcoded machine: Data General Nova, RDOS
* 15.6 Expanded accumulator machine: Intel x86, DOS, TASM
* 15.7 ASSEMBLER x86 (DOS, MASM)
* 15.8 ASSEMBLER x86 (DOS, FASM)
* 15.9 Expanded accumulator machine: Intel x86, Microsoft Windows, FASM
* 15.10 Expanded accumulator machine: Intel x86, Linux, FASM
* 15.11 Expanded accumulator machine: Intel x86, Linux, GAS
* 15.12 Expanded accumulator machine: Intel x86, Linux, NASM
* 15.13 Expanded accumulator machine: Intel x86, Linux, GLibC, NASM
* 15.14 General-purpose fictional computer: MIX, MIXAL
* 15.15 General-purpose fictional computer: MMIX, MMIXAL
* 15.16 General-purpose-register CISC: DEC PDP-11
* 15.16.1 RT-11, MACRO-11
* 15.16.2 Variant for Elektronika BK using BIOS function, MICRO-11
* 15.17 CISC Amiga (Workbench 2.0): Motorola 68000
* 15.18 CISC Atari: Motorola 68000
* 15.19 CISC Sharp X68000 (Human68K): Motorola 68000
* 15.20 CISC on advanced multiprocessing OS: DEC VAX, VMS, MACRO-32
* 15.21 Mainframe: IBM z/Architecture series using BAL
* 15.22 RISC processor: ARM, RISC OS, BBC BASIC's in-line assembler
* 15.23 RISC processor: MIPS architecture
* 15.24 RISC processor: PowerPC, Mac OS X, GAS
* 15.25 Sigma 6/7/8/9 METASYMBOL
* 16 AutoHotkey
* 17 AutoIt
* 18 Avenue (scripting language for ArcView GIS)
* 19 AWK
* 20 B
* 21 Baan Tools
* 21.1 3GL Format
* 21.2 4GL Format
* 22 Bash or sh
* 23 BASIC
* 23.1 General
* 23.2 BlitzBasic
* 23.3 DarkBASIC
* 23.4 FreeBasic
* 23.5 CoolBasic
* 23.6 GW-BASIC
* 23.7 Liberty BASIC
* 23.8 Microsoft Small Basic
* 23.9 PBASIC
* 23.10 StarOffice/OpenOffice Basic
* 23.11 PureBasic
* 23.12 TI-BASIC
* 23.13 Visual Basic
* 23.14 Visual Basic .NET
* 23.15 PICK/BASIC, DATA/BASIC, MV/BASIC
* 24 Batch (MS-DOS)
* 25 bc
* 26 BCPL
* 27 BITGGAL AgileDog
* 28 BITGGAL Jihwaja
* 29 BLISS
* 30 BlitzMax
* 31 boo
* 32 Burning Sand 2
* 33 C
* 33.1 ANSI C
* 34 Caché Server Pages (CSP)
* 35 Calprola
* 36 C/AL - MBS Navision
* 37 Casio FX-9750
* 38 CCL
* 39 Ch
* 40 Chuck
* 41 Chrome
* 42 CIL
* 43 CintieFramework (VisualBasic.NET)
* 44 Clean
* 45 Clipper
* 46 CLIST
* 47 Clojure
* 48 CLU
* 49 COBOL
* 50 CoffeeScript
* 51 ColdFusion (CFML)
* 52 COMAL
* 53 Common Lisp
* 54 Cube
* 55 C++
* 55.1 C++/CLI
* 55.2 C++, Managed (.NET)
* 56 C#
* 57 D
* 58 Dart
* 59 DC, an arbitrary precision calculator
* 60 DCL batch
* 61 Delphi
* 62 DIV
* 63 DOLL
* 64 Dream Maker
* 65 Dylan
* 66 EAScripting
* 67 Ed and Ex (Ed extended)
* 68 Eiffel
* 69 Elixir
* 70 Elm
* 71 Erlang
* 72 Euphoria
* 73 Factor
* 74 Falcon
* 75 Ferite
* 76 filePro
* 77 Fjölnir
* 78 FOCAL
* 79 Focus
* 80 Forte TOOL
* 81 Forth
* 82 Fortran
* 82.1 Fortran 77
* 82.2 Fortran 90/95
* 83 F#
* 84 Fril
* 85 Frink
* 86 Gambas
* 87 GEMBase 4GL
* 88 GeneXus
* 89 GML (Game Maker Language)
* 90 Go (from Google)
* 91 GraalScript
* 91.1 GraalScript 1
* 91.2 GraalScript 2
* 92 Groovy
* 93 Harbour
* 94 Haskell
* 95 Haxe
* 96 Heron
* 97 HP 33s
* 98 HP-41 & HP-42S
* 99 HyperTalk (Apple HyperCard's scripting programming language)
* 100 Icon
* 101 IDL
* 102 Io
* 103 Inform
* 103.1 Inform 5/6
* 103.2 Inform 7
* 104 Iptscrae
* 105 J
* 106 Jal
* 107 Java
* 107.1 Java byte-code
* 107.2 Java byte-code Jasmin Syntax
* 108 JavaFX Script
* 109 JavaScript
* 110 JCL (mainframe Job Control Language)
* 111 Joy
* 112 JSP
* 113 Julia
* 114 K
* 115 ksi
* 116 Kotlin
* 117 Kogut
* 118 KPL (Kids Programming Language)
* 119 Lasso
* 120 Lexico Mobile (in Spanish)
* 121 Linden Scripting Language
* 122 Linotte
* 123 Lisaac
* 124 Lisp
* 124.1 Common Lisp
* 124.2 Scheme
* 124.3 Clojure
* 124.4 Emacs Lisp
* 124.5 AutoLisp
* 124.6 XLISP
* 124.7 Arc
* 124.8 Pils
* 125 Logo
* 126 LPC
* 127 Lua
* 127.1 LuaDEV (PSP and Wii)
* 128 M (MUMPS)
* 129 Macsyma, Maxima
* 130 Maple
* 131 Mathematica
* 132 MATLAB / GNU Octave
* 133 Maude
* 134 Max
* 135 Maya Embedded Language
* 136 Mesham
* 137 M4
* 138 mIRC Script
* 138.1 aliases
* 138.2 remote
* 138.3 popups
* 138.4 command line
* 139 Model 204
* 140 Modula-2
* 141 Monkey
* 142 MOO
* 143 Mouse
* 144 MPI
* 145 M# Fictional Computer Language
* 145.1 Script
* 145.2 Command WI
* 145.3 Command WoI
* 146 MS-DOS batch
* 147 MUF
* 148 Natural
* 149 Neko
* 150 Nemerle
* 151 Nim
* 152 NXT 2.1 (the Lego Robot program)
* 153 Oberon
* 154 Obix
* 155 ObjectGears
* 156 Objective C
* 156.1 Procedural C Version
* 156.2 Object-Oriented C Version
* 156.3 OPENSTEP/Cocoa Version
* 157 OCaml
* 158 occam
* 159 OpenScript
* 160 OPL
* 161 OPS5
* 162 OPS83
* 163 Oz
* 164 Parrot assembly language
* 165 Parrot intermediate representation
* 166 Pascal
* 167 PAWN
* 168 Perl
* 168.1 As PL file
* 168.2 As CGI file
* 169 Perl 6
* 170 Phix
* 171 PHP
* 172 Pike
* 173 PILOT
* 174 PL/SQL
* 175 PL/I
* 176 PostScript
* 177 PowerShell
* 178 Processing
* 179 Progress 4GL
* 180 Prolog
* 181 Pure Data
* 182 Python
* 182.1 As a script/module
* 182.1.1 Python 2 and earlier
* 182.1.2 Python 3
* 182.1.3 Any Python version
* 182.1.4 Two easter eggs
* 182.2 In the REPL
* 182.3 As CGI file
* 182.4 Flask
* 182.5 Kivy
* 183 R
* 184 Rebol
* 185 Red
* 186 Redcode
* 187 REFAL
* 188 Revolution
* 188.1 Printed in the message box
* 188.2 Shown within a dialog box
* 188.3 Printed on the main window interface
* 188.4 As CGI file
* 189 REXX, ARexx, NetRexx, and Object REXX
* 190 Ring
* 191 RPG
* 191.1 Free-Form Syntax
* 191.2 Traditional Syntax
* 192 RPG Code
* 192.1 Message Window
* 192.2 On Screen Text
* 193 RPL
* 194 RT Assembler
* 195 Ruby
* 196 Rust
* 197 S (and R)
* 198 S-Lang
* 199 SAS
* 200 Sather
* 201 Scala
* 202 SCAR
* 203 Scheme
* 204 Scratch
* 205 sed
* 206 Seed7
* 207 Self
* 208 sense script
* 209 ShadowScript
* 210 Simula
* 211 Smalltalk
* 212 SML
* 213 SNOBOL
* 214 Span
* 215 SPARK
* 216 Spin
* 217 SPITBOL
* 218 SPSS Syntax
* 219 SSPL
* 220 Standard ML
* 221 SQL
* 222 STARLET
* 223 Stata
* 224 SuperCollider
* 225 Supernova
* 226 Swift
* 227 TACL
* 228 Tcl (Tool command language)
* 229 Template Toolkit
* 230 Thyme
* 231 TOM (rewriting language)
* 232 TSQL
* 233 TTCN-3
* 234 Turing
* 235 UNIX-style shell
* 236 Vala
* 237 Verilog
* 238 VHDL
* 239 Visual Basic Script
* 240 Visual Prolog
* 241 VRML (Virtual Reality Modeling Language)
* 242 Web Assembly
* 243 X#
* 244 X3D (Extensible 3D)
* 245 XC
* 246 XL
* 247 XMLmosaic
* 248 Yorick
* 249 Zdzich
* 250 Graphical user interfaces (GUIs)
* 250.1 ActionScript (Adobe Flash)
* 250.2 AppleScript
* 250.3 boo
* 250.4 C#
* 250.5 Clarion
* 250.6 Cocoa or GNUStep (In Objective C)
* 250.7 Curl
* 250.8 Delphi, Kylix
* 250.9 Erlang
* 250.10 Euphoria
* 250.11 F#
* 250.12 FLTK2 (in C++)
* 250.13 G (LabVIEW)
* 250.14 Gtk# (in C#)
* 250.15 GTK+ 2.x (in Euphoria)
* 250.16 IOC/OCL (in IBM VisualAge for C++)
* 250.17 Java Swing
* 250.18 Java with JavaFX and FXML files
* 250.19 Java with GTK (java-gnome)
* 250.20 K
* 250.21 Microsoft Foundation Classes (in C++)
* 250.22 Adobe Flex MXML
* 250.23 NSIS
* 250.24 OCaml
* 250.25 OPL
* 250.26 Pure Data
* 250.27 Python
* 250.28 Qt toolkit (in C++)
* 250.29 Rebol
* 250.30 Red
* 250.31 Robotic (MegaZeux)
* 250.32 RPL
* 250.33 RTML
* 250.34 Ruby with WxWidgets
* 250.35 Ruby with GTK+
* 250.36 Ruby with Tk
* 250.37 Smalltalk
* 250.38 SWT with Java
* 250.39 Tk
* 250.40 Tcl with Tk
* 250.41 Ubercode
* 250.42 Uniface
* 250.43 Virtools
* 250.44 VBA
* 250.45 Visual Basic .NET 2003/2005
* 250.46 Visual Prolog (note box)
* 250.47 Windows API (in C)
* 250.48 Xojo
* 250.49 XUL
* 250.50 Maple
* 251 Document formats
* 251.1 ASCII
* 252 Page description languages
* 252.1 XHTML 1.1
* 252.2 HTML
* 252.2.1 Simple
* 252.2.2 Informal
* 252.2.3 HTML 4.01 Strict (full)
* 252.2.4 HTML 4.01 Strict (smallest)
* 252.2.5 HTML 5
* 252.3 MediaWiki/Wikitext
* 252.4 PDF
* 252.5 PostScript
* 252.6 RTF
* 252.7 SVG
* 252.8 TeX
* 252.9 LaTeX 2ε
* 252.10 ConTeXt
* 253 Media-based scripting languages
* 253.1 AviSynth
* 253.2 Lingo (Macromedia Director scripting language)
* 253.3 POV-Ray
* 254 Esoteric programming languages
* 254.1 0815
* 254.2 Alef++
* 254.3 Arrow
* 254.4 Befunge
* 254.5 Binary lambda calculus
* 254.6 BlooP, FlooP
* 254.7 brainfuck
* 254.8 Chef
* 254.9 False
* 254.10 HQ9+
* 254.11 INTERCAL programming language
* 254.12 LOLCODE
* 254.13 Malbolge programming language
* 254.14 P programming language
* 254.15 Perl
* 254.16 Piet
* 254.17 Rockstar
* 254.18 Shakespeare
* 254.19 SNUSP
* 254.20 Spoon (programming language)
* 254.21 Super NAND Time!!
* 254.22 Taxi programming language
* 254.23 T programming language
* 254.24 This=That
* 254.25 Unlambda programming language
* 254.26 Var'aq programming language
* 254.27 Whitespace
* 254.28 XS programming language
* 254.29 Ya programming language
* 254.30 DUNNBOL1
* 254.31 SM

## 4DOS batch

It should be noted that the 4DOS/4NT batch language is a superset of the MS-DOS batch language.

@echo Hello, world!

## Ingres 4GL

message "Hello, world!" with style = popup;

## ABAP/4 - SAP AG

REPORT ZHELLO.
START-OF-SELECTION.
WRITE "Hello, world!".

## ABAP Objects (NetWeaver 7)

The example below makes use of the singleton pattern and outputs the text in a message box instead of a classic list output.

REPORT ZHELLO.
CLASS lcl_hello DEFINITION CREATE PRIVATE FINAL.
PUBLIC SECTION.
CLASS-DATA self TYPE REF TO lcl_hello READ-ONLY.
CLASS-METHODS class_constructor.
METHODS say_hello.
PRIVATE SECTION.
CONSTANTS con_hello_world TYPE c LENGTH 13 VALUE 'Hello, World!'.
ENDCLASS.
CLASS lcl_hello IMPLEMENTATION.
METHOD class_constructor.
CREATE OBJECT lcl_hello=>self.
ENDMETHOD.
METHOD say_hello.
MESSAGE con_hello_world TYPE 'I'.
ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
lcl_hello=>self->say_hello( ).

## ABC

WRITE "Hello, world!"

## ActionScript

### ActionScript 1.0 and 2.0

This will output to the output window only, which an end user would not see.

trace("Hello, world!");

This version will be visible to the end user.

var helloWorld:TextField = this.createTextField( "helloWorld", this.getNextHighestDepth(), 1, 1, 100, 20 );
helloWorld.text = "Hello, world!";

### ActionScript 3

package

public class HelloWorld

public function HelloWorld()

trace("Hello, world!");

## Ada

with Ada.Text_IO;

procedure Hello is
begin
Ada.Text_IO.Put_Line ("Hello, world!");
end Hello;

## ALGOL 68

The ALGOL 68 standard requires that reserved-words, types and operators are in a different typeface. Hence programs are typically published in either bold or an underline typeface, e.g.:

begin
printf($"Hello, world!"l$)
end

In the popular upper-case stropping convention for bold words:

BEGIN
printf($"Hello, world!"l$)
END

or using a wikitext like quote stropping, this is especially suitable on computers with only 6 bits per character (hence only have UPPERCASE):

'BEGIN'
PRINTF($"HELLO, WORLD!"L$)
'END'

or minimally using the "brief symbol" form of begin and end.

( printf($"Hello, world!"l$) )

## AmigaE

PROC main()
WriteF('Hello, world!');
ENDPROC

## AMX NetLinx

This program sends the message out via the Diagnostics Interface after start-up.

program_name = 'Hello'
define_start
send_string 0,'Hello World!'

## ANT

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE project>
<project default="helloworld">
<target name="helloworld">
<echo message="Hello, World!" />
</target>
</project>

## APL

∇R←HWΔPGM
[1] R←'HELLO WORLD!'

* The Del on the first line begins function definition for the program named HWΔPGM. It is a niladic function (no parameters, as opposed to monadic or dyadic) and it will return an explicit result which allows other functions or APL primitives to use the returned value as input.

* The line labeled 1 assigns the text vector 'Hello, world!!' to the variable R

* The last line is another Del which ends the function definition.

When the function is executed by typing its name the APL interpreter assigns the text vector to the variable R, but since we have not used this value in another function, primitive, or assignment statement the interpreter returns it to the terminal, thus displaying the words on the next line below the function invocation.

The session would look like this

HWΔPGM
Hello, world!!

While not a program, if you simply supplied the text vector to the interpreter but did not assign it to a variable it would return it to the terminal as output. Note that user input is automatically indented 6 spaces by the interpreter while results are displayed at the beginning of a new line.

'Hello, world!'
Hello, world!!

## AppleScript

return "Hello, world!"

or:

display dialog "Hello, world!"

## ASP

<% Response.Write("Hello, world!") %>

or simply:

<%= "Hello, world!" %>

### ASP.NET

// in the page behind using C#
protected void Page_Load(object sender, EventArgs e)

Response.Write("Hello, world!");

' in the page behind using VB.NET
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
Response.Write("Hello, world!")
End Sub

// ASPX Page Template

<asp:Literal ID="Literal1" runat="server" Text="Hello World!"></asp:Literal>

<asp:Label ID="Label1" runat="server" Text="Hello World"></asp:Label>

Hello World!

## Assembly language

### Accumulator-only architecture: DEC PDP-8, PAL-III assembler

See the example program in the Wikipedia PDP-8 article.

### First successful uP/OS combinations: Intel 8080/Zilog Z80, CP/M, RMAC assembler

bdos    equ    0005H    ; BDOS entry point
start:  mvi    c,9      ; BDOS function: output string
lxi    d,msg$   ; address of msg
call   bdos
ret             ; return to CCP

msg$:   db    'Hello, world!$'
end     start

### Popular home computer: ZX Spectrum, Zilog Z80, HiSoft GENS assembler

10          ORG #8000    ; Start address of the routine
20 START    LD A,2       ; set the output channel
30          CALL #1601   ; to channel 2 (main part of TV display)
40          LD HL,MSG    ; Set HL register pair to address of the message
50 LOOP     LD A,(HL)    ; De-reference HL and store in A
60          CP 0         ; Null terminator?
70          RET Z        ; If so, return
80          RST #10      ; Print the character in A
90          INC HL       ; HL points at the next char to be printed
100          JR LOOP
110 MSG      DEFM "Hello, world!"
120          DEFB 13      ; carriage return
130          DEFB 0       ; null terminator

### Accumulator + index register machine: MOS Technology 6502, CBM KERNEL, MOS assembler syntax

A_CR  = $0D              ;carriage return
BSOUT = $FFD2            ;kernel ROM sub, write to current output device

LDX #$00         ;starting index in .X register

LOOP    LDA MSG,X        ;read message text
BEQ LOOPEND      ;end of text

JSR BSOUT        ;output char
INX
BNE LOOP         ;repeat

LOOPEND RTS              ;return from subroutine

MSG     .BYT 'Hello, world!',A_CR,$00

### Accumulator/Index microcoded machine: Data General Nova, RDOS

See the example section of the Nova article.

### Expanded accumulator machine: Intel x86, DOS, TASM

MODEL   SMALL
IDEAL
STACK   100H

DATASEG
MSG DB 'Hello, world!', 13, '$'

CODESEG
Start:
MOV AX, @data
MOV DS, AX
MOV DX, OFFSET MSG
MOV AH, 09H      ; DOS: output ASCII$ string
INT 21H
MOV AX, 4C00H
INT 21H
END Start

### ASSEMBLER x86 (DOS, MASM)

.MODEL Small
.STACK 100h
.DATA
db msg 'Hello, world!$'
.CODE
start:
mov ah, 09h
lea dx, msg ; or mov dx, offset msg
int 21h
mov ax,4C00h
int 21h
end start

### ASSEMBLER x86 (DOS, FASM)

; FASM example of writing 16-bit DOS .COM program
; Compile: "FASM HELLO.ASM HELLO.COM"
org  $100
use16
mov  ah,9
mov  dx,xhello
int  $21    ; DOS call: text output
mov  ah,$4C
int  $21    ; Return to DOS
xhello db 'Hello world !!!$'

### Expanded accumulator machine: Intel x86, Microsoft Windows, FASM

Example of making 32-bit PE program as raw code and data:

format PE GUI
entry start

section '.code' code readable executable

start:

push   0
push   _caption
push   _message
push   0
call   [MessageBox]

push   0
call   [ExitProcess]

section '.data' data readable writeable

_caption db 'Win32 assembly program',0
_message db 'Hello, world!',0

section '.idata' import data readable writeable

dd 0,0,0,RVA kernel_name,RVA kernel_table
dd 0,0,0,RVA user_name,RVA user_table
dd 0,0,0,0,0

kernel_table:
ExitProcess dd RVA _ExitProcess
dd 0
user_table:
MessageBox dd RVA _MessageBoxA
dd 0

kernel_name db 'KERNEL32.DLL',0
user_name db 'USER32.DLL',0

_ExitProcess dw 0
db 'ExitProcess',0
_MessageBoxA dw 0
db 'MessageBoxA',0

section '.reloc' fixups data readable discardable

Using FASM import macro, unicode (MessageBoxW is one of few unicode functions 'supported' by Windows 9x/ME) and section sharing, no relocation (not required for 32-bit Windows NT executables, recommended for DOS-based Windows, required for x64), no heap - Not a beginners example but only 1024 instead of 3072 bytes:

format PE GUI 4.0
heap 0
entry start
include 'win32a.inc'

section '.text' code import readable executable data
library kernel, 'KERNEL32.DLL',\
user,'USER32.DLL'

import kernel,\
ExitProcess, 'ExitProcess'
import user,\
MessageBoxW, 'MessageBoxW'

start:
xor ebx, ebx
push ebx
push ebx
push _message
push ebx
call [MessageBoxW]

push ebx
call [ExitProcess]

_message du 'Hello, world!' ,0
section '.reloc' fixups data readable discardable

### Expanded accumulator machine: Intel x86, Linux, FASM

format ELF executable
entry _start

_start:
mov eax, 4
mov ebx, 1
mov ecx, msg
mov edx, msg_len
int 80h

mov ebx, 0
mov eax, 1
int 80h

msg db 'Hello, world!', 0xA
msg_len = $-msg

### Expanded accumulator machine: Intel x86, Linux, GAS

.data
msg:
.ascii     "Hello, world!\n"
len = . - msg
.text
.global _start
_start:
movl $len,�x
movl $msg,�x
movl $1,�x
movl $4,�x
int $0x80
movl $0,�x
movl $1,�x
int $0x80

### Expanded accumulator machine: Intel x86, Linux, NASM

section .data
msg     db      'Hello, world!',0xA
len     equ     $-msg

section .text
global  _start
_start:
mov     edx,len
mov     ecx,msg
mov     ebx,1
mov     eax,4
int     0x80

mov     ebx,0
mov     eax,1
int     0x80

### Expanded accumulator machine: Intel x86, Linux, GLibC, NASM

extern printf ; Request symbol "printf".
global main   ; Declare symbol "main".

section .data
str: DB "Hello World!", 0x0A, 0x00

section .text
main:
PUSH str    ; Push string pointer onto stack.
CALL printf ; Call printf.
POP eax     ; Remove value from stack.
MOV eax,0x0 ; \_Return value 0.
RET         ; /

### General-purpose fictional computer: MIX, MIXAL

TERM    EQU    19          console device no. (19 = typewriter)
ORIG   1000        start address
START   OUT    MSG(TERM)   output data at address MSG
HLT                halt execution
MSG     ALF    "HELLO"
ALF    " WORL"
ALF    "D    "
END    START       end of program

### General-purpose fictional computer: MMIX, MMIXAL

string  BYTE   "Hello, world!",#a,0   string to be printed (#a is newline and 0 terminates the string)
Main  GETA   $255,string            get the address of the string in register 255
TRAP   0,Fputs,StdOut         put the string pointed to by register 255 to file StdOut
TRAP   0,Halt,0               end process

### General-purpose-register CISC: DEC PDP-11

#### RT-11, MACRO-11

.MCALL  .REGDEF,.TTYOUT,.EXIT
.REGDEF

HELLO:  MOV    #MSG,R1
MOVB   (R1)+,R0
LOOP:  .TTYOUT
MOVB   (R1)+,R0
BNE    LOOP
.EXIT

MSG:   .ASCIZ  /Hello, world!/
.END    HELLO

#### Variant for Elektronika BK using BIOS function, MICRO-11

MOV     #TXT,R1              ;Moving string address to R1
CLR     R2                   ;String length=0, means null will be the termination character
EMT     20                   ;Print the string
HALT

TXT:    .ASCIZ  /Hello, world!/
.END

### CISC Amiga (Workbench 2.0): Motorola 68000

include lvo/exec_lib.i
include lvo/dos_lib.i

; open DOS library
movea.l  4.w,a6
lea      dosname(pc),a1
moveq    #36,d0
jsr      _LVOOpenLibrary(a6)
movea.l  d0,a6

; actual print string
lea      hellostr(pc),a0
move.l   a0,d1
jsr      _LVOPutStr(a6)

; close DOS library
movea.l  a6,a1
movea.l  4.w,a6
jsr      _LVOCloseLibrary(a6)
rts

dosname     dc.b 'dos.library',0
hellostr    dc.b 'Hello, world!',0

### CISC Atari: Motorola 68000

;print
move.l   #Hello,-(A7)
move.w   #9,-(A7)
trap     #1
addq.l   #6,A7

;wait for key
move.w   #1,-(A7)
trap     #1
addq.l   #2,A7

;exit
clr.w   -(A7)
trap    #1

Hello
dc.b    'Hello, world!',0

### CISC Sharp X68000 (Human68K): Motorola 68000

pea (strign)    ; push string address onto stack
dc.w $FF09      ; call DOS "print" by triggering an exception
addq.l #4,a7    ; restore the stack pointer

dc.w $FF00      ; call DOS "exit"

strign:
dc.b "Hello, world!",13,10,0

### CISC on advanced multiprocessing OS: DEC VAX, VMS, MACRO-32

.title    hello

.psect    data, wrt, noexe

chan:   .blkw     1
iosb:   .blkq     1
term:   .ascid    "SYS$OUTPUT"
msg:    .ascii    "Hello, world!"
len =   . - msg

.psect    code, nowrt, exe

.entry    hello, ^m<>

; Establish a channel for terminal I/O
$assign_s devnam=term, -
chan=chan
blbc      r0, end

; Queue the I/O request
$qiow_s   chan=chan, -
func=#io$_writevblk, -
iosb=iosb, -
p1=msg, -
p2=#len

; Check the status and the IOSB status
blbc      r0, end
movzwl    iosb, r0

; Return to operating system
end:    ret

.end       hello

### Mainframe: IBM z/Architecture series using BAL

HELLO    CSECT               The name of this program is 'HELLO'
USING *,12          Tell assembler what register we are using
SAVE (14,12)        Save registers
LR    12,15         Use Register 12 for this program
WTO   'Hello, world!' Write To Operator
RETURN (14,12)      Return to calling party
END  HELLO          This is the end of the program

### RISC processor: ARM, RISC OS, BBC BASIC's in-line assembler

.program
ADR R0, message
SWI "OS_Write0"
SWI "OS_Exit"
.message
EQUS "Hello, world!"
EQUB 0
ALIGN

or the even smaller version (from qUE);

SWI "OS_WriteS":EQUS "Hello, world!":EQUB0:ALIGN:MOV PC,R14

### RISC processor: MIPS architecture

.data
msg:     .asciiz "Hello, world!"
.align 2
.text
.globl main
main:
la $a0,msg
li $v0,4
syscall
jr $ra

### RISC processor: PowerPC, Mac OS X, GAS

.data
msg:
.ascii "Hello, world!\n"
len = . - msg

.text
.globl _main

_main:
li r0, 4 ; write
li r3, 1 ; stdout
addis r4, 0, ha16(msg) ; high 16 bits of address
addi r4, r4, lo16(msg) ; low 16 bits of address
li r5, len ; length

li r0, 1 ; exit
li r3, 0 ; exit status

### Sigma 6/7/8/9 METASYMBOL

SYSTEM   BPM
START  M:PRINT (MESS,HW)
M:EXIT
HW     TEXTC    'HELLO WORLD'
END      START

## AutoHotkey

MsgBox, Hello, world!

(The comma after the command name is optional.)

## AutoIt

MsgBox(0,'','Hello, world!')

## Avenue (scripting language for ArcView GIS)

MsgBox("Hello, world!","aTitle")

## AWK

BEGIN { print "Hello, world!" }

## B

This is the first known Hello, world! program ever written:[1]

main( ) {
extrn a, b, c;
putchar(a); putchar(b); putchar(c); putchar('!*n');

a 'hell';
b 'o, w';
c 'orld';

## Baan Tools

Also known as Triton Tools on older versions. On Baan ERP you can create a program on 3GL or 4GL mode.

### 3GL Format

function main()

message("Hello, world!")

### 4GL Format

choice.cont.process:
on.choice:
message("Hello, world!")

On this last case you should press the Continue button to show the message.

## Bash or sh

echo 'Hello, world!'

printf 'Hello, world!\n'

or using the C preprocessor

#!/bin/bash
#define cpp #
cpp $0 2> /dev/null | /bin/bash; exit $?
#undef cpp
#define HELLO_WORLD echo "hello, world"
HELLO_WORLD | tr a-z A-Z

## BASIC

### General

The following example works for any ANSI/ISO-compliant BASIC implementation, as well as most implementations built into or distributed with microcomputers in the 1970s and 1980s (usually some variant of Microsoft BASIC):

10 PRINT "Hello, world!"
20 END

Note that the "END" statement is optional in many implementations of BASIC.

Some implementations could also execute instructions in an immediate mode when line numbers are omitted. The following examples work without requiring a RUN instruction.

PRINT "Hello, world!"

? "Hello, world!"

Later implementations of BASIC allowed greater support for structured programming and did not require line numbers for source code. The following example works when RUN for the vast majority of modern BASICs.

PRINT "Hello, world!"
END

Again, the "END" statement is optional in many BASICs.

### BlitzBasic

Print "Hello, world!"
WaitKey

### DarkBASIC

PRINT "Hello, world!"

TEXT 0,0,"Hello, world!"
WAIT KEY

Note: In the "classic" Dark Basic the WAIT KEY command is optional as the console goes up when the program has finished.

### FreeBasic

PRINT "Hello World"
SLEEP
END

PRINT "Hello World"

? "Hello World"

'without a newline
? "Hello World";

### CoolBasic

AddText "Hello, world!"
DrawScreen
WaitKey

### GW-BASIC

10 PRINT "Hello, World!"
20 END

### Liberty BASIC

To write to the main window:

print "Hello, world"

Or drawn in a graphics window:

nomainwin
open "Hello, world!" for graphics as #main
print #main, "place 50 50"
print #main, "\Hello, world!"
print #main, "flush"
wait

### Microsoft Small Basic

TextWindow.WriteLine("Hello, world!")

### PBASIC

DEBUG "Hello, world!", CR

or, the typical microcontroller Hello, world! program equivalent with the only output device present being a light-emitting diode (LED) (in this case attached to the seventh output pin):

HIGH 7 'Make the 7th pin go high (turn the LED on)
PAUSE 500 'Sleep for half a second
LOW 7 ' Make the 7th pin go low (turn the LED off)
PAUSE 500 'Sleep for half a second
LOOP
END

### StarOffice/OpenOffice Basic

sub main
print "Hello, world!"
end sub

### PureBasic

OpenConsole()
PrintN("Hello, world!")
Input()

MessageRequester("Hello, World","Hello, World")

Debug "Hello, World"

### TI-BASIC

On TI calculators of the TI-80 through TI-86 range:

:Disp "Hello, world!          (note the optional ending quotes)
:Output(X,Y,"Hello, world!    (note the optional ending parenthesis)
:Text(X,Y,"Hello, world!      (writes to the graph rather than home screen)
:Text(-1,X,Y,"Hello, world!   (only on the 83+ and higher, provides larger text, home screen size)
:"Hello, world!               (last line of program only)

Note: "!" character is not on the keypad. It can be accessed from "Catalog" menu, "Probability" menu, or "Math" menu (as factorial notation).

On TI-89/TI-89 Titanium/TI-92(+)/Voyage 200 calculators:

:hellowld()
:Prgm
:Disp "Hello, world!"
:EndPrgm

### Visual Basic

Public Sub Main()
Debug.Print "Hello, world!"
End Sub

Public Sub Main()
MsgBox "Hello, world!"
End Sub

Private Sub Form_Activate()
Print "Hello, world!"
End Sub

Alternatively, copy this into a New Form:

Private Sub Form_Click()
Form1.Hide
Dim HelloWorld As New Form1
HelloWorld.Width = 2500: HelloWorld.Height = 1000: HelloWorld.Caption = "Hello, world!": HelloWorld.CurrentX = 500: HelloWorld.CurrentY = 75
HelloWorld.Show: HelloWorld.Font = "Tahoma": HelloWorld.FontBold = True: HelloWorld.FontSize = 12: HelloWorld.Print "Hello, world!"
End Sub

### Visual Basic .NET

Module HelloWorldApp
Sub Main()
System.Console.WriteLine("Hello, world!")
End Sub
End Module

### PICK/BASIC, DATA/BASIC, MV/BASIC

In addition to the ANSI syntax at the head of this article, most Pick operating system flavors of Dartmouth BASIC support extended syntax allowing cursor placement and other terminfo type functions for VDT's

X, Y positioning (colon ":" is the concatenation instruction):

PRINT @(34,12) : "Hello, world!"

Will display the string "Hello, world!" roughly centered in a 80X24 CRT.

Other functions:

PRINT @(-1) : @(34,12) : "Hello, world!"

Will clear the screen before displaying the string "Hello, world!" roughly centered in a 80X24 CRT.

Syntax variants:

CRT "Hello, world!"

Supporting the "@" functions above, the CRT statement ignores previous PRINTER statements and always sends output to the screen.

Some Pick operating system environments such as OpenQM support the DISPLAY variant of PRINT. This variant in addition to the "@" functions maintains pagination based upon the settings of the TERM variable:

DISPLAY "Hello, world!"

## Batch (MS-DOS)

@echo Hello World!

@echo off
set hellostring=Hello World!
echo %hellostring%

@echo off
echo Hello World!
pause
exit

## bc

"Hello, world!"

or, with the newline

print "Hello, world!\n"

## BCPL

GET "LIBHDR"

LET START () BE

WRITES ("Hello, world!*N")

## BITGGAL AgileDog

1 "Hello, World"

## BITGGAL Jihwaja

J( 1 TM 5 ZV 3 "Hello, world" )

## BLISS

%TITLE 'HELLO_WORLD'
MODULE HELLO_WORLD (IDENT='V1.0', MAIN=HELLO_WORLD,
ADDRESSING_MODE (EXTERNAL=GENERAL)) =
BEGIN

LIBRARY 'SYS$LIBRARY:STARLET';

EXTERNAL ROUTINE
LIB$PUT_OUTPUT;

GLOBAL ROUTINE HELLO_WORLD =
BEGIN
LIB$PUT_OUTPUT(%ASCID %STRING('Hello, world!'))
END;

END
ELUDOM

## BlitzMax

SuperStrict
Graphics 640, 480, 0, 60

Local running:Int = 1
While running
Cls
DrawText "Hello World!", 1, 1
Flip

If GetChar()
running = 0
EndIf
Wend

End

## boo

See also GUI section.

print "Hello, world!"

## Burning Sand 2

WRITE ELEMENT:Earth 210 230 40 CENTER TEXT "Hello World!"

## C

#include <stdio.h>

int main()

printf("Hello, world!\n");
return 0;

### ANSI C

#include <stdio.h>

int main(void) {
printf("Hello, World!\n");

return 0;

## Caché Server Pages (CSP)

Class Test.Hello Extends %CSP.Page [ ProcedureBlock ]

ClassMethod OnPage() As %Status

&html<<html>
<head>
</head>
<body>>
Write "Hello, world!",!
&html<</body>
</html>>
Quit $$$OK

## Calprola

This program will work on the Avasmath 80 online programmable calculator.

#BTN A1
#PRI "HELLO WORLD!"
#END

## C/AL - MBS Navision

OBJECT Codeunit 50000 HelloWorld

PROPERTIES

OnRun=BEGIN
MESSAGE(Txt001);
END;

CODE

VAR
Txt001@1000000000 : TextConst 'ENU=Hello, world!';
BEGIN

Hello, world! in C/AL (Microsoft Business Solutions-Navision)

END.

## Casio FX-9750

This program will work on the fx-9750 graphing calculator and compatibles.

"Hello, world!"↵

Locate 1,1,"Hello, world!"↵

## CCL

call echo("Hello, world!")

## Ch

The above C code can run in Ch as examples. The simple one in Ch is:

printf("Hello, world!\n");

## Chuck

<<<"Hello World">>>;

## Chrome

namespace HelloWorld;

interface

type
HelloClass = class
public
class method Main;
end;

implementation

class method HelloClass.Main;
begin
System.Console.WriteLine('Hello, world!');
end;

end.

## CIL

.assembly Hello {}
.assembly extern mscorlib {}
.method static void Main()

.entrypoint
.maxstack 1
ldstr "Hello, world!"
call void [mscorlib]System.Console::WriteLine(string)
ret

## CintieFramework (VisualBasic.NET)

<Script>
<References>
<Reference>System.dll</Reference>
</References>
<Code Language="VisualBasic">
<![CDATA[
Public Class Plugin
Public Function MainF(ByVal Ob As Object) As String
'Script Code
Return "Hello, World!"
End Function
End Class
]]>
</Code>
</Script>

## Clean

module hello

Start = "Hello, world!"

## Clipper

? "Hello, world!"

@1,1 say "Hello, world!"

Qout("Hello, world")

## CLIST

PROC 0
WRITE Hello, world!

## Clojure

(println "Hello, world!")

## CLU

start_up = proc ()
po: stream := stream$primary_output ()
stream$putl (po, "Hello, world!")
end start_up

## COBOL

IDENTIFICATION DIVISION.
PROGRAM-ID.  HELLO-WORLD.
PROCEDURE DIVISION.
DISPLAY "Hello, world!".
STOP RUN.

The above is a very abbreviated and condensed version, which omits the author name and source and destination computer types.

## CoffeeScript

CoffeeScript is a little language that compiles into JavaScript. And like JavaScript, it does not have native (built in) input or output routines. Instead it relies on the facilities provided by its host environment.

Using an alert, using a standard Web browser's window object (window.alert)

alert 'Hello, world!'

or, from Firebug, Apple Safari, or Google Chrome debug console, or Node.js console

console.log 'Hello, world!'

## ColdFusion (CFML)

<cfoutput>Hello, world!</cfoutput>

Hello, world!

## COMAL

PRINT "Hello, world!"

## Common Lisp

(princ "Hello, world!")

## Cube

Function | Main
WriteLine | "Hello, world"
End | Main

The '|' refers to the separation of the two text fields in the Cube standard IDE.

## C++

#include <iostream>

int main() {
std::cout << "Hello, World!" << std::endl;
return 0;

### C++/CLI

int main() {
System::Console::WriteLine("Hello, world!");
return 0;

### C++, Managed (.NET)

#using <mscorlib.dll>

using namespace System;

int wmain()

Console::WriteLine("Hello, world!");
return 0;

## C#

See also GUI section.

using System;

internal static class HelloWorld

private static void Main()

Console.WriteLine("Hello, world!");

## D

import std.stdio ;

void main () {
writefln("Hello, world!");

Tango version:

import tango.io.Stdout;

void main() {
Stdout ("Hello, world!").newline;

## Dart

main() {
print('Hello, world!');

Or,

void main() {
print('Hello, world!');

## DC, an arbitrary precision calculator

[Hello, world!]p

1468369091346906859060166438166794P

## DCL batch

$ write sys$output "Hello, world!"

## Delphi

{$APPTYPE CONSOLE}
begin
Write('Hello, world!');
end.

## DIV

PROGRAM hello;
BEGIN
write(0, 0, 0, 0, "Hello, world!");
LOOP
FRAME;
END
END

## DOLL

this::operator()

import system.cstdio;
puts("Hello, world!");

## Dream Maker

mob
Login()
..()
world << "Hello, world!"

## Dylan

module: hello

format-out("Hello, world!\n");

## EAScripting

set disp to "Hello, world!"
set dispto to item unit 5 //5 = default screen
release disp into dispto.

This would be a pure system call

import system ea.helloworld
wait

## Ed and Ex (Ed extended)

Hello, world!!

## Eiffel

class HELLO_WORLD

create make
feature
make is

io.put_string("Hello, world!%N")
end -- make
end -- class HELLO_WORLD

## Elixir

IO.puts "Hello, world!"

## Elm

import Html exposing (text)

main =
text "Hello, World!"

## Erlang

See also GUI section.

-module(hello).

-export([hello/0]).

hello() -> io:format("Hello, world!~n").

## Euphoria

puts(1, "Hello, world!")

## Factor

"Hello, world!" print

or gui version

"Hello, world!" <label> "Hi" open-window

## Falcon

printl( "Hello world" )

## Ferite

uses "console";

Console.println("Hello, world!");

## filePro

@once:
mesgbox "Hello, world!" ; exit

## Fjölnir

"halló" < main

main ->
stef(;)
stofn
skrifastreng(;"Halló, veröld!"),
stofnlok

"GRUNNUR"

## FOCAL

type "Hello, world!",!

t "Hello, world!",!

## Focus

-TYPE Hello, world!

## Forte TOOL

begin TOOL HelloWorld;

includes Framework;
HAS PROPERTY IsLibrary = FALSE;

forward  Hello;

-- START CLASS DEFINITIONS

class Hello inherits from Framework.Object

has public  method Init;

has property
shared=(allow=off, override=on);
transactional=(allow=off, override=on);
monitored=(allow=off, override=on);
distributed=(allow=off, override=on);

end class;
-- END CLASS DEFINITIONS

-- START METHOD DEFINITIONS

method Hello.Init
begin
super.Init();

task.Part.LogMgr.PutLine('Hello, world!');
end method;
-- END METHOD DEFINITIONS
HAS PROPERTY
CompatibilityLevel = 0;
ProjectType = APPLICATION;
Restricted = FALSE;
MultiThreaded = TRUE;
Internal = FALSE;
LibraryName = 'hellowor';
StartingMethod = (class = Hello, method = Init);

end HelloWorld;

## Forth

: HELLO  ( -- )  ." Hello, world!" CR ;
HELLO

or instead of compiling a new routine, one can type directly in the Forth interpreter console

CR ." Hello, world!" CR

## Fortran

### Fortran 77

00    program hello
write(*,*) 'Hello World!'
stop
end

### Fortran 90/95

program hello
write(*,*) 'Hello, World!'
end program hello

## F#

printfn "Hello, world!"

## Fril

?((pp "Hello, world!"))

pp "Hello, world!"

## Frink

println["Hello, world!"]

## Gambas

See also GUI section.

PUBLIC SUB Main()
Print "Hello, world!"
END

## GEMBase 4GL

procedure_form hello
begin_block world
print "Hello, world!"
end_block
end_form

## GeneXus

Msg("Hello World")

## GML (Game Maker Language)

In the draw event of some object:

draw_text(x,y,"Hello, world!")

Or to show a splash screen message:

show_message("Hello, world!")

## Go (from Google)

package main

import "fmt"

func main() {
fmt.Println("Hello, world!")

## GraalScript

### GraalScript 1

if (created) {
echo Hello, world!;

### GraalScript 2

function onCreated() {
echo("Hello, world!");

## Groovy

println "Hello, world!"

## Harbour

? "Hello, world!"

@1,1 say "Hello, world!"

Qout("Hello, world")

## Haskell

main = putStrLn "Hello, world!"

## Haxe

class HelloWorldApp

static function main()

trace("Hello, world!");

## Heron

program HelloWorld;
functions {
_main() {
print_string("Hello, world!");

end

## HP 33s

(Handheld Hewlett-Packard RPN-based scientific calculator.)

LBL H
SF 10
EQN
RCL H
RCL E
RCL L
RCL L
RCL O
R/S
RCL W
RCL O
RCL R
RCL L
RDL D
ENTER
R/S

## HP-41 & HP-42S

(Handheld Hewlett-Packard RPN-based alphanumeric engineering calculators.)

01 LBLTHELLO

02 THello, world!

03 PROMPT

## HyperTalk (Apple HyperCard's scripting programming language)

put "Hello, world!"

Answer "Hello, world!"

## Icon

procedure main()
write("Hello, world!")
end

## IDL

print,"Hello, world!"

## Io

"Hello, world!" println

writeln("Hello, world!")

## Inform

### Inform 5/6

[ Main;
"Hello, world!";

### Inform 7

Hello World is a room.  The printed name is "Hello, world!"

## Iptscrae

ON ENTER {
"Hello, " "world!" & SAY

## J

'Hello, world!' NB. echoes the string in interactive mode, doesn't work in script

'Hello World!' 1!:2(2) NB. prints it to (2) - screen, (4) - stdout

## Jal

include 16f877_20
include hd447804

hd44780_clear

hd44780 = "H"
hd44780 = "e"
hd44780 = "l"
hd44780 = "l"
hd44780 = "o"
hd44780 = " "
hd44780 = "W"
hd44780 = "o"
hd44780 = "r"
hd44780 = "l"
hd44780 = "d"
hd44780 = "!"

## Java

See also GUI section.

class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, world!");

### Java byte-code

(disassembler output of `javap -c HelloWorld`)

public class HelloWorld extends java.lang.Object{
public HelloWorld();
Code:
0:   aload_0
1:   invokespecial   #1; //Method java/lang/Object."<init>":()V
4:   return
public static void main(java.lang.String[]);
Code:
0:   getstatic       #2; //Field java/lang/System.out:Ljava/io/PrintStream;
3:   ldc     #3; //String Hello, world!
5:   invokevirtual   #4; //Method java/io/PrintStream.println:(Ljava/lang/String;)V
8:   return

### Java byte-code Jasmin Syntax

.class HelloWorld
.super java/lang/Object
.method public static main([Ljava/lang/String;)V
.limit stack 2
getstatic java/lang/System/out Ljava/io/PrintStream;
ldc "Hello, world!"
invokevirtual java/io/PrintStream/println(Ljava/lang/String;)V
return
.end method

## JavaFX Script

JavaFX Script was a scripting language formerly called F3 for Form Follows Function. It was discontinued by Oracle in 2010.

Frame {
title: "Hello World JavaFX"
width: 200
content: Label {
text: "Hello World"

visible: true

This program can also be written in this way:

var win = new Frame();
win.title = "Hello World JavaFX";
win.width = 200;
var label = new Label();
label.text = "Hello World";
win.content = label;
win.visible = true;

A simple console output version would be:

import java.lang.System;
System.out.println("Hello World");

Or even simpler (with a built-in function):

println("Hello World");

## JavaScript

JavaScript does not have native (built in) input or output routines. Instead it relies on the facilities provided by its host environment.

Using a standard Web browser's document object

document.write('Hello, World!');

or with an alert, using a standard Web browser's window object (window.alert)

alert('Hello, world!');

or, from the Mozilla command line implementation

print('Hello, world!');

or, from the Windows Script Host

WScript.Echo('Hello, world!');

or, from Firebug, Apple Safari, or Google Chrome debug console

console.log('Hello, world!');

## JCL (mainframe Job Control Language)

//HERIB    JOB  ,'HERIBERT OTTEN',PRTY=12
//* HELLO WORLD FOR MVS
//HALLO    EXEC PGM=IEBGENER
//SYSIN    DD DUMMY
//SYSPRINT DD SYSOUT=*
//SYSUT2   DD SYSOUT=T
//SYSUT1   DD *
HELLO WORLD!

## Joy

"Hello, world!\n" putchars .

## JSP

<%@ page contentType="text/html;charset=WINDOWS-1252"%>
<HTML>
<BODY>
<% out.println(" Hello, world!"); %>
</BODY>
</HTML>

or just

<% out.println("Hello, world!"); %>

or literally

Hello, world!

## Julia

println("Hello, world!")

## K

`0:"Hello, world!\n"

## ksi

`plain
'Hello World!' #echo #

## Kotlin

fun main() {
println("Hello World!")

## Kogut

WriteLine "Hello, world!"

## KPL (Kids Programming Language)

Program HelloWorld
Method Main()
ShowConsole()
ConsoleWriteLine("Hello, world!")
End Method
End Program

## Lasso

Output: 'Hello, world!';

Output('Hello, world!');

or simply

'Hello, world!';

## Lexico Mobile (in Spanish)

tarea muestre "Hola mundo !"

clase Saludo derivada_de Form
publicos
mensajes
Saludo copie "Hola mundo !" en saludo.Text

## Linden Scripting Language

Linden Scripting Language is the scripting language used within Second Life

default

state_entry()

llSetText("Hello, World!" , <0,0,0> , 1.0);
//or...
llSay(0,"Hello, World!");

## Linotte

Livre : HelloWorld
Paragraphe : Affichage
Actions :
"Hello, World !" !

## Lisaac

Section Header
+ name := HELLO_WORLD_PROGRAM;

Section Public
- main <-

"Hello world!\n".print;

## Lisp

Lisp has many dialects that have appeared over its almost fifty-year history.

### Common Lisp

(format t "Hello, world!~%")

(write-line "Hello, world!")

or in the REPL:

"Hello, world!"

(As a string (enclosed in quotes) it evaluates to itself, so is printed.)

### Scheme

(display "Hello, world!\n")

### Clojure

(println "Hello, world!")

### Emacs Lisp

(print "Hello, world!")

or:

(message "Hello, world!")

### AutoLisp

(print "Hello, world!")

### XLISP

(print "Hello, world!")

### Arc

(prn "Hello, world!")

### Pils

(out "Hello, world!")

## Logo

print [Hello, world!]

pr [Hello, world!]

In MSWLogo only

messagebox [Hi] [Hello, world!]

## LPC

void create()

write("Hello, world!\n");

## Lua

io.write("Hello, world!\n")

return "Hello, World!"

print("Hello, world")

### LuaDEV (PSP and Wii)

screen.print(10,10,"Hello, world!")

## M (MUMPS)

W "Hello, world!"

## Macsyma, Maxima

print("Hello, world!")$

## Maple

print("Hello, world!");

## Mathematica

Print["Hello, world!"]

or simply:

"Hello, world!"

## MATLAB / GNU Octave

disp('Hello, world!')

fprintf('Hello, world!\n')

or with a GUI

figure('Position',[100 100 200 200],'MenuBar','none','Name','Hello World');
uicontrol('Style','text','Position',[15 100 150 15],'String','Hello world');

msgbox('Hello World!')

## Maude

fmod HELLOWORLD is
protecting STRING .
op helloworld : -> String .
eq helloworld = "Hello, world!" .
endfm
red helloworld .

## Max

max v2;
#N vpatcher 10 59 610 459;
#P message 33 93 63 196617 Hello, world!!;
#P newex 33 73 45 196617 loadbang;
#P newex 33 111 31 196617 print;
#P connect 1 0 2 0;
#P connect 2 0 0 0;
#P pop;

## Maya Embedded Language

print( "Hello, world!\n" );

## Mesham

var x:String::allocated[on[0]];
x:="Hello World";  // allocated on process 0 only
proc 1 {
// This is displayed by process 1, auto communication done to achieve this
print[x];

## M4

Hello, world!

## mIRC Script

### aliases

helloworld echo Hello, world!

### remote

alias helloworld echo Hello, world!

### popups

Hello World:echo Hello, world!

### command line

echo Hello, world!

## Model 204

BEGIN
PRINT 'Hello, world!'
END

## Modula-2

MODULE Hello;

FROM InOut IMPORT WriteLn, WriteString;

BEGIN
WriteString ("Hello, world!");
WriteLn
END Hello.

## Monkey

Strict

Function Main:Int()
Print "Hello World!"

Return 0
End

## MOO

This requires that you be the player or a wizard:

notify(player, "Hello, world!");

This is specific to the implementation of the core used for the moo, but works on most well known moos, such as LambdaCore or JH-Core:

player:tell("Hello, world!");

## Mouse

"Hello, World!"

## MPI

#include <stdio.h>
#include <time.h>
#include <string.h>
#include "mpi.h"

int main ( int argc, char * argv[] )

const int   maximum_message_length = 100;
const int   master_rank            =   0;
char        message[maximum_message_length+1];
MPI_Status  status;      /* Info about receive status  */
int         my_rank;     /* This process ID            */
int         num_procs;   /* Number of processes in run */
int         source;      /* Process ID to receive from */
int         destination; /* Process ID to send to      */
int         tag = 0;     /* Message ID                 */
int         mpi_error;   /* Error code for MPI calls   */
int         icount;
char        processor_name[MPI_MAX_PROCESSOR_NAME];
int         name_length;

// Initialize the MPI execution environment.

mpi_error = MPI_Init ( &argc, &argv );
if ( mpi_error != MPI_SUCCESS )

fprintf ( stderr, "Error: %s: Unable to initialize MPI execution environment\nAborting ...\n", argv[0] );
return ( 1 );

// Even though we capture the error value from the MPI calls, we will
// not deal with any error except the last one.

mpi_error = MPI_Comm_rank ( MPI_COMM_WORLD, &my_rank );
mpi_error = MPI_Comm_size ( MPI_COMM_WORLD, &num_procs );
if ( my_rank != master_rank )

mpi_error = MPI_Get_processor_name (processor_name, &name_length );
sprintf ( message, "Greetings from process #%d running on %s\n", \
my_rank, processor_name );
destination = master_rank;
mpi_error = MPI_Send ( message, strlen(message) + 1, MPI_CHAR,  \
destination, tag, MPI_COMM_WORLD );

else

for ( source = 0; source < num_procs; source++ )

if ( source != master_rank )

mpi_error = MPI_Recv ( message, maximum_message_length + 1, \
MPI_CHAR, source, tag, MPI_COMM_WORLD, &status );
printf ( "%s  \n", message );

mpi_error = MPI_Finalize();
if ( MPI_SUCCESS != mpi_error )
return ( mpi_error );
else
return ( 0 );

## M# Fictional Computer Language

### Script

main(std:string >>arg<< / OS.GetArg)

std:stream >>CONSOLE<< / OS.Console;

CONSOLE:Write([byte]{0048, 0065, 006C, 006C, 006F, 002C, 0058, 006F, 0072, 006C, 0064});
//                    H     e     l     l     o     ,     W     o     r     l     d   //

### Command WI

# # DEFINE g >>CONSOLE<< / OS.Console
# % proc CONSOLE:Write([byte]{0048, 0065, 006C, 006C, 006F, 002C, 0058, 006F, 0072, 006C, 0064})

### Command WoI

# @ Write([byte]{0048, 0065, 006C, 006C, 006F, 002C, 0058, 006F, 0072, 006C, 0064})

## MS-DOS batch

(with the standard command.com interpreter. The @ symbol is optional and prevents the system from repeating the command before executing it. The @ symbol must be omitted on versions of MS-DOS prior to 3.0.). It's very common for batchfiles to start with two lines of "@echo off" and "cls".

@echo Hello, world!

For MS-DOS 3.0 or lower

echo off
cls
echo Hello, world!

## MUF

: main
me @ "Hello, world!" notify

## Natural

WRITE 'Hello, world!'
END

WRITE 'Hello, world!'.

## Neko

$print("Hello, world!!\n");

## Nemerle

The easiest way to get Nemerle print "Hello, world!" would be that:

System.Console.WriteLine("Hello, world!");

however, in bigger applications the following code would be probably more useful:

using System.Console;

module HelloWorld

Main():void

WriteLine("Hello, world!");

## Nim

echo "Hello, world!"

echo("Hello, world!")

## NXT 2.1 (the Lego Robot program)

## Oberon

Oberon is both the name of a programming language and an operating system.

Program written for the Oberon operating system:

MODULE Hello;
IMPORT Oberon, Texts;
VAR W: Texts.Writer;

PROCEDURE World*;
BEGIN
Texts.WriteString(W, "Hello, world!");
Texts.WriteLn(W);
Texts.Append(Oberon.Log, W.buf)
END World;

BEGIN
Texts.OpenWriter(W)
END Hello.

Freestanding Oberon program using the standard Oakwood library:

MODULE Hello;
IMPORT Out;
BEGIN
Out.String("Hello, world!");
Out.Ln
END Hello.

## Obix

system.console.write_line ( "Hello, world!" )

## ObjectGears

Message to the user in the form:

OGForm.SetInfo('Hello world!');

Entry into the log:

OG.Log.Write('Hello world!');

## Objective C

### Procedural C Version

#import <stdio.h>

int main (int argc, const char *argv[])

printf ("Hello, world!\n");
return 0;

### Object-Oriented C Version

#import <stdio.h>
#import <objc/Object.h>

@interface Hello : Object

- hello;
@end

@implementation Hello
- hello

printf("Hello, world!\n");

@end

int main(void)

id obj;
obj = [Hello new];
[obj hello];
[obj free];
return 0;

### OPENSTEP/Cocoa Version

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])

NSLog(@"Hello, world!");
return 0;

## OCaml

print_endline "Hello, world!" ;;

## occam

#USE "course.lib"

PROC hello.world(CHAN OF BYTE screen!)
out.string("Hello, world!*n", 0, screen!)

or without using course.lib

PROC hello.world(CHAN OF BYTE screen!)
SEQ
screen ! 'H'
screen ! 'e'
screen ! 'l'
screen ! 'l'
screen ! 'o'
screen ! ','
screen ! ' '
screen ! 'w'
screen ! 'o'
screen ! 'r'
screen ! 'l'
screen ! 'd'
screen ! '!'
screen ! '*n'

## OpenScript

-- in a popup window
request "Hello world"

## OPL

See also GUI section.

PROC hello:
PRINT "Hello, world!"
ENDP

## OPS5

(object-class request
^action)

(startup
(strategy MEA)
(make request ^action hello)

(rule hello
(request ^action hello)
(write |Hello, world!| (crlf))

## OPS83

module hello (main)
{  procedure main( )

write() |Hello, world!|, '\n';

## Oz

{Browse 'Hello, world!'}

## Parrot assembly language

print "Hello, world!\n"
end

## Parrot intermediate representation

.sub hello :main
print "Hello, world!!\n"
.end

## Pascal

begin
write('Hello, world!');
end.

## PAWN

main() {
print("Hello, World!");

main() {
new string[14];
format string(sizeof(string), "Hello, World!);
print(string);

## Perl

### As PL file

print "Hello, world!\n";

(the semicolon is optional)

package Hello;
sub new() { bless {} }
sub Hello() { print "Hello, world! \n" }
package main;
my $hello = Hello->new();
$hello->Hello();

### As CGI file

#!/usr/local/bin/perl
print "Content-type: text/html\n\n";
print "<H1>Hello World!</H1>";

## Perl 6

"Hello, world!".say

say "Hello, world!";

print "Hello, world!\n";

## Phix

puts(1, "Hello, world!")

## PHP

PHP is a templating language and will echo any text not within PHP tags directly, so the simplest form is:

Hello, world!

Using actual PHP statements, it can be written:

<?php
echo 'Hello, world!';

or use short-hand echoing, syntaxed as such:

<? echo "Hello, world!"?>

this will also work:

<?= "Hello, world!" ?>

## Pike

int main() {
write("Hello, world!\n");
return 0;

## PILOT

T:Hello, world!

## PL/SQL

set serveroutput on size 1000000;  -- this is a SQL*Plus command to enable the output buffer
begin
dbms_output.put_line('Hello, world!');
end;

## PL/I

Test: proc options(main);
put list('Hello, world!');
end Test;

## PostScript

See also page description language section.

(Hello, world!\n) print

## PowerShell

"Hello, world!"

Write-Host "Hello, world!"

echo "Hello, world!"

[System.Console]::WriteLine("Hello, world!")

[void][System.Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms')
[System.Windows.Forms.MessageBox]::Show("Hello, World!")

## Processing

println("Hello, world!");

## Progress 4GL

display "Hello, world!".

## Prolog

:- write('Hello, world!'),nl.

## Pure Data

#N canvas 0 0 300 300 10;
#X obj 100 100 loadbang;
#X msg 100 150 Hello, world!;
#X obj 100 200 print;
#X connect 0 0 1 0;
#X connect 1 0 2 0;

## Python

### As a script/module

#### Python 2 and earlier

print "Hello, world!"

#### Python 3

print("Hello, world!")

This also works on Python 2.4 or later, but in an unintuitive way. In Python 3, it calls the `print` function with the string `"Hello, world!"`. In Python 2, it executes the `print` statement with the expression `("Hello, world!")`, which evaluates to the string `"Hello, world!"`.

#### Any Python version

import sys
sys.stdout.write("Hello, world!\n")

In Python 2.6 or later:

from __future__ import print_function
print("Hello, world!")

#### Two easter eggs

import __hello__
import __phello__

### In the REPL

'Hello, world!' (with quotation marks) can be attained through:

'Hello, world!'

### As CGI file

#!/usr/local/bin/python
print("Content-type: text/html\n\n")
print("Hello World!")

### Flask

As Python's Flask web microframework

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
return "Hello World!"

app.run()

### Kivy

Python's Kivy multi-platform framework

import kivy

from kivy.app import App
from kivy.uix.label import Label

class MyApp(App):
def build(self):
return Label(text='Hello world')

MyApp().run()

## R

print('Hello, world!')

## Rebol

See also GUI section.

print "Hello, world!"

## Red

See also GUI section.

print "Hello, world!"

## Redcode

; Should work with any MARS >= ICWS-86
; with 128x64 gfx core
Start MOV 0,2455
MOV 0,2458
MOV 0,2459
MOV 0,2459
MOV 0,2459
MOV 0,2459
MOV 0,2459
MOV 0,2460
MOV 0,2465
MOV 0,2471
MOV 0,2471
MOV 0,2471
MOV 0,2479
MOV 0,2482
MOV 0,2484
MOV 0,2484
MOV 0,2484
MOV 0,2486
MOV 0,2486
MOV 0,2486
MOV 0,2486
MOV 0,2488
MOV 0,2493
MOV 0,2493
MOV 0,2493
MOV 0,2493
MOV 0,2497
MOV 0,2556
MOV 0,2559
MOV 0,2560
MOV 0,2565
MOV 0,2570
MOV 0,2575
MOV 0,2578
MOV 0,2585
MOV 0,2588
MOV 0,2589
MOV 0,2592
MOV 0,2593
MOV 0,2596
MOV 0,2597
MOV 0,2603
MOV 0,2605
MOV 0,2608
MOV 0,2667
MOV 0,2670
MOV 0,2671
MOV 0,2676
MOV 0,2681
MOV 0,2686
MOV 0,2689
MOV 0,2696
MOV 0,2699
MOV 0,2700
MOV 0,2703
MOV 0,2704
MOV 0,2707
MOV 0,2708
MOV 0,2714
MOV 0,2716
MOV 0,2719
MOV 0,2778
MOV 0,2778
MOV 0,2778
MOV 0,2778
MOV 0,2778
MOV 0,2779
MOV 0,2779
MOV 0,2779
MOV 0,2782
MOV 0,2787
MOV 0,2792
MOV 0,2795
MOV 0,2802
MOV 0,2805
MOV 0,2806
MOV 0,2809
MOV 0,2810
MOV 0,2810
MOV 0,2810
MOV 0,2810
MOV 0,2812
MOV 0,2818
MOV 0,2820
MOV 0,2823
MOV 0,2882
MOV 0,2885
MOV 0,2886
MOV 0,2891
MOV 0,2896
MOV 0,2901
MOV 0,2904
MOV 0,2911
MOV 0,2912
MOV 0,2913
MOV 0,2914
MOV 0,2917
MOV 0,2918
MOV 0,2919
MOV 0,2922
MOV 0,2928
MOV 0,2930
MOV 0,2933
MOV 0,2992
MOV 0,2995
MOV 0,2996
MOV 0,3001
MOV 0,3006
MOV 0,3011
MOV 0,3014
MOV 0,3021
MOV 0,3022
MOV 0,3023
MOV 0,3024
MOV 0,3027
MOV 0,3028
MOV 0,3030
MOV 0,3032
MOV 0,3038
MOV 0,3040
MOV 0,3103
MOV 0,3106
MOV 0,3107
MOV 0,3107
MOV 0,3107
MOV 0,3107
MOV 0,3107
MOV 0,3108
MOV 0,3108
MOV 0,3108
MOV 0,3108
MOV 0,3108
MOV 0,3109
MOV 0,3109
MOV 0,3109
MOV 0,3109
MOV 0,3109
MOV 0,3111
MOV 0,3111
MOV 0,3111
MOV 0,3120
MOV 0,3121
MOV 0,3124
MOV 0,3124
MOV 0,3124
MOV 0,3126
MOV 0,3129
MOV 0,3130
MOV 0,3130
MOV 0,3130
MOV 0,3130
MOV 0,3130
MOV 0,3131
MOV 0,3131
MOV 0,3131
MOV 0,3131
MOV 0,3135
JMP 0

## REFAL

$ENTRY GO{=<Prout 'Hello, world!'>;}

## Revolution

(This works the same for Transcript or xTalk)

### Printed in the message box

put "Hello, World!"

### Shown within a dialog box

answer "Hello, world!"

### Printed on the main window interface

create field "myField"
set the text of field "myField" to "Hello, world!"

### As CGI file

#!revolution

on startup
put "Content-Type: text/plain" & cr & cr
put "Hello World!"
end startup

## REXX, ARexx, NetRexx, and Object REXX

/* a starting comment is needed in mainframe versions */
say "Hello, world!"

## Ring

see "hello world!"

## RPG

### Free-Form Syntax

/FREE

DSPLY 'Hello, world!';

*InLR = *On;

/END-FREE

### Traditional Syntax

With this syntax, a constant has to be used because the message must be placed in positions 12 to 25, between apostrophes.

d TestMessage     c                   Const( 'Hello, world!' )

c     TestMessage   DSPLY

c                   EVAL      *InLR = *On

## RPG Code

### Message Window

Using the internal message window, a simple Hello, world! program can be rendered thus:

mwin("Hello, world!")
wait()

### On Screen Text

An additional way to render text is by using the built in text() function.

text(1,1,"Hello, world!")
wait()

## RPL

See also GUI section.

(On Hewlett-Packard HP-28, HP-48 and HP-49 series graphing calculators.)

CLLCD
"Hello, world!" 1 DISP
0 WAIT
DROP

## RT Assembler

_name   Hello~World!
pause   Hello~World!
exit
_end

## Ruby

See also GUI section.

puts 'Hello, world!'

'Hello, world!'.each { |s| print s }

class String
def say
puts self
end
end
'Hello, world!'.say

## Rust

fn main() {
println!("Hello, world!");

## S (and R)

print("Hello, world")

message("Hello, world")

## S-Lang

message("Hello, world!");

## SAS

%put Hello, world!;

## Sather

class HELLO_WORLD is
main is
#OUT+"Hello, world!\n";
end;
end;

## Scala

object HelloWorld extends App {
println("Hello, world!")

App was introduced since Scala 2.1, and Application was deprecated since Scala 2.9.0. Use Application instead of App for versions below 2.1.

## SCAR

program HelloWorld;
begin
WriteLn('Hello world!');
end.

## Scheme

(display "Hello, World!") (newline)

## Scratch

## sed

(Note: requires at least one line of input)

sed -ne '1s/.*/Hello, world!/p'

## Seed7

$ include "seed7_05.s7i";

const proc: main is func
begin
writeln("Hello, world");
end func;

## Self

'Hello, world!' print.

## sense script

out('Hello, world!');

## ShadowScript

'set up initial variables
struct.follow

cpu.fan.speed(500.rpm)
cpu.max.process(100)

logic.handle(0)
int main()
int var()
array.max(100000000)

'open and write the text in a free handle window
open mainwin(io<std>) as free(1)

write.free(1).("Hello",&sym," world",&sym)(&sym<",">&sym<"!">
apply.free(1) to text

'reset the fan, cpu, and vars

logic(std)
fan(std.auto)
cpu.max(auto)
unint main()
unint var()
un.array.max(std)

'end
end
.end/

## Simula

BEGIN
OutText("Hello, world!");
OutImage;
END

## Smalltalk

Transcript show: 'Hello, world!'

alternative:

StdoutStream nextPutLine: 'Hello, world'

## SML

print "Hello, world!\n";

## SNOBOL

OUTPUT = "Hello, world!"
END

## Span

class Hello {
static public main: args {
Console << "Hello, world!\n";

## SPARK

with Spark_IO;
--# inherit Spark_IO;
--# main_program;

procedure Hello_World
--# global in out Spark_IO.Outputs;
--# derives Spark_IO.Outputs from Spark_IO.Outputs;

begin
Spark_IO.Put_Line (Spark_IO.Standard_Output, "Hello, world!", 0);
end Hello_World;

## Spin

Spin is the high level language from Parallax Inc. used to program their Propeller multi-core micro-controllers.

The program assumes that the software UART object, provided with the Propeller IDE, is used to deliver the message over a serial line.

CON
_clkmode = xtal1 + pll16x
_xinfreq = 5_000_000
OBJ
console : "FullDuplexSerial"
PUB start
console.start(31, 30, 0, 115_200)
console.str(string("Hello, world!", 13))

## SPITBOL

OUTPUT = "Hello, world!"
END

## SPSS Syntax

ECHO "Hello, world!".

## SSPL

1.0
print Hello, World!
end

## Standard ML

print "Hello, world!\n";

## SQL

CREATE TABLE message (text char(15));
INSERT INTO message (text) VALUES ('Hello, world!');
SELECT text FROM message;
DROP TABLE message;

or (for EnterpriseDB's Stored Procedure Language (SPL))

BEGIN
DBMS_OUTPUT.PUT_LINE('Hello, world!');
END;

or (e.g. Oracle dialect)

SELECT 'Hello, world!' FROM dual;

or (for Oracle's PL/SQL proprietary procedural language)

BEGIN
DBMS_OUTPUT.ENABLE(1000000);
DBMS_OUTPUT.PUT_LINE('Hello, world!');
END;

or (e.g. MySQL or PostgreSQL dialect)

SELECT 'Hello, world!';

or (for PostgreSQL's PL/pgSQL Procedural language)

CREATE FUNCTION hello_world() RETURNS text AS $$
BEGIN
RETURN 'Hello, world!';
END
$$ LANGUAGE plpgsql;

or (e.g. T-SQL dialect)

PRINT 'Hello, world!'

or (for KB-SQL dialect)

select Null from DATA_DICTIONARY.SQL_QUERY

FOOTER ''or HEADER or DETAIL or FINAL event''
write "Hello, world!"

## STARLET

RACINE: HELLO_WORLD.

NOTIONS:
HELLO_WORLD : ecrire("Hello, world!").

## Stata

Define program in script (.do-file) or at command line:

capture program drop hello /*Define Hello, world! program*/
program define hello
di "Hello, world!"
end

hello  /*run Hello, world! program*/

Or, interactively at the command line:

di "Hello, world!"

## SuperCollider

"Hello, world!".postln;

or, for interactive prompt,

"Hello, world!"

## Supernova

I want window and the window title is hello world.

## Swift

println("Hello, world!") // Swift 1.x

print("Hello, world!")   // Swift 2.x

## TACL

#OUTPUT Hello, world!

## Tcl (Tool command language)

See also GUI section.

puts "Hello, world!"

## Template Toolkit

[% GET "Hola mundo!"; %]

## Thyme

print ("Hello, world!")

## TOM (rewriting language)

public class HelloWorld {
%include { string.tom }
public final static void main(String[] args) {
String who = "world";
%match(String who) {
"World" -> { System.out.println("Hello, " + who + "!"); }
_       -> { System.out.println("Don't panic"); }

## TSQL

Declare @Output varchar(16)
Set @Output='Hello, world!'
Select 'Output' = @Output

or, simpler variations:

Select 'Hello, world!'
Print 'Hello, world!'

## TTCN-3

module hello_world {
control {
log("Hello, world!");

## Turing

put "Hello world!"

## UNIX-style shell

echo 'Hello, world!'

or using an inline 'here document'

cat <<'DELIM'
Hello, world!
DELIM

printf '%s' $'Hello, world!\n'

or for a curses interface:

dialog --msgbox 'Hello, world!' 0 0

## Vala

using GLib;

public int main(string[] args)

stdout.printf("Hello, world!\n");
return 0;

## Verilog

module main();
initial begin
#0 $display("Hello, world!!");
#1 $finish;
end
endmodule

or (a little more complicated)

module hello(clk);
input clk;
always @(posedge clk) $display("Hello, world!!");
endmodule
module main();
reg     clk;
hello H1(clk);
initial begin
#0 clk=0;
#5 clk=1;
#1 $finish;
end
endmodule

module hello(clk);
input clk;
always @(posedge clk) $display("Hello, world!!");
endmodule
module main();
reg     clk;
hello H1(clk);
initial begin
#0 clk=0;
#23 $display("--23--");
#100 $finish;
end
always #5 clk=~clk;
endmodule

## VHDL

use std.textio.all;

entity Hello is
end Hello;

architecture Hello_Arch of Hello is
begin
p : process
variable l:line;
begin
write(l, String'("Hello, world!"));
writeline(output, l);
wait;
end process;
end Hello_Arch;

## Visual Basic Script

WScript.Echo "Hello, world!"

OR as a VBscript file

MsgBox "Hello, world!"

## Visual Prolog

#include @"pfc\console\console.ph"

goal
console::init(),
stdio::write("Hello, world!").

## VRML (Virtual Reality Modeling Language)

#X3D V3.3 utf8
Shape {
geometry Text {
string [ "hello, world" ]

## Web Assembly

(module
(type $type0 (func (result i32)))
(table 0 anyfunc)
(memory 1)
(export "memory" memory)
(export "hello" $func0)
(func $func0 (result i32)
i32.const 16

(data (i32.const 16)
"Hello World\00"

## X#

sub:main
load:mscorlib.dll
push:Hello, World!
invoke:mscorlib.dll:System.Console:Write:1
endsub

## X3D (Extensible 3D)

<X3D profile='Immersive' version='3.3'>
<Scene>
<Shape>
<Text string='"hello, world"'/>
</Shape>
</Scene>
</X3D>

## XC

XC is a C like language from XMOS Ltd offering features supporting Communicating Sequential Processes on their multi-threaded, multi-core processors. This example shows some of those features.

#include <platform.h>
#define BIT_RATE 115200
#define BIT_TIME XS1_TIMER_HZ / BIT_RATE

// A one bit output port with buffering
out port:1 buffered uart_tx = PORT_UART_TX;

// Thread implements serial transmitter using the ports timer.
void console (chanend c, out port:1 buffered TXD)

unsigned time;
char byte;

while (1)

c :> byte;					// Read byte from the consol output channel.
TXD <: 0 @ time;				// Set start bit and save IO time stamp.
for (int j = 0; j < 8; j += 1)		// Data bits.

time += BIT_TIME;		// Time of next bit.
TXD @ time <: >> byte;	// Shift out next bit on time.

time += BIT_TIME;			// Two stop bits
TXD @ time <: 1;
time += BIT_TIME;
TXD @ time <: 1;

// Thread issues greeting message to the console
void greeter(chanend c)

char msg[] = "Hello World!\n";
int i;
while (1)					// Repeatedly send message to console output channel.

for (i = 0; i < sizeof(msg) - 1; i++)

c <: msg[i];                    // Output a byte to the channel.

int main()

chan c;						// Communication channel between threads.
par						// Parallel execution of block statements.

on stdcore[0]: console(c, uart_tx);	// Run console output thread on core 0.
on stdcore[1]: greeter(c);		// Run greeter thread or core 1.

return 0;

## XL

use XL.UI.CONSOLE
WriteLn "Hello, world!"

import IO = XL.UI.CONSOLE
IO.WriteLn "Hello, world!"

## XMLmosaic

<Class>
<Type>XMLmosaic Class</Type>
<Method>
<Name id="1">Main</Name>
<Code id="1">void Main()

Console.WriteLine('Hello World!');

</Code>
</Method>
<Counter>
<Count>1</Count>
</Counter>
</Class>

## Yorick

write, "Hello, world!";

Note: The semicolon is optional.

## Zdzich

Programming language with commands in Polish. Webpage

pisz Hello World!
koniec

## Graphical user interfaces (GUIs)

### ActionScript (Adobe Flash)

this.createTextField("hello_txt",0,10,10,100,20);
this.hello_txt.text="Hello, world!";

### AppleScript

display dialog "Hello, world!" buttons {"OK"} default button 1

### boo

import System.Drawing
import System.Windows.Forms
f = Form()
f.Controls.Add(Label(Text: "Hello, world!", Location: Point(40,30)))
f.Controls.Add(Button(Text: "Ok", Location: Point(50, 55), Click: {Application.Exit()}))
Application.Run(f)

Functional equivalent of C# program below.

### C#

Simply, using Message Box:

public class HelloWorld

static void Main()

System.Windows.Forms.MessageBox.Show("Hello, world!");

Or:

using System;
using System.Drawing;
using System.Windows.Forms;

public class HelloWorldForm : Form

public static void Main()

Application.Run(new HelloWorldForm());

public HelloWorldForm()

Label label = new Label();
label.Text = "Hello, world!";
label.Location = new Point(40,30);
this.Controls.Add(label);
Button button = new Button();
button.Text = "OK";
button.Location = new Point(50,55);
this.Controls.Add(button);
button.Click += new EventHandler(button_Click);

private void button_Click(Object sender, EventArgs e)

Application.Exit();

### Clarion

The simplest way to achieve this is with the built in message function that is similar to the windows messageBox().

PROGRAM
MAP
END
CODE
MESSAGE('Hello, world!!','Clarion')
RETURN

A more real world example uses a Clarion structure to declare a window and the Clarion Accept loop to process events from that window.

PROGRAM
MAP
HelloProcedure  PROCEDURE()
END

CODE
HelloProcedure()
RETURN

HelloProcedure  PROCEDURE()
Window WINDOW('Clarion for Windows'),AT(,,222,116),FONT('Tahoma',8,,FONT:regular),ICON('Hey.ICO'), |
SYSTEM,GRAY
STRING('Hello, world!!'),AT(91,22),USE(?String1)
BUTTON('Close'),AT(92,78,37,14),USE(?CloseBtn),LEFT
END
CODE
OPEN(Window)
ACCEPT
CASE ACCEPTED()
OF ?CloseBtn
POST(EVENT:CloseWindow)
END
END
CLOSE(Window)
RETURN

### Cocoa or GNUStep (In Objective C)

#import <Cocoa/Cocoa.h>
@interface hello : NSObject {

@end

@implementation hello

-(void)awakeFromNib

NSBeep(); // we don't need this but it's conventional to beep
// when you show an alert
NSRunAlertPanel(@"Message from your Computer", @"Hello, world!", @"Hi!",
nil, nil);

@end

### Curl

{curl 3.0, 4.0 applet}
{curl-file-attributes character-encoding = "utf-8"}

Hello, world!

### Delphi, Kylix

program Hello_World;
uses
QDialogs;

begin
ShowMessage('Hello, world!');
end.

program Hello_World;
uses
QDialogs;

begin
MessageDlg ('Hello, world!', mtInformation, [mbOk], 0);
end.

### Erlang

-module(hello_world).
-export([hello/0]).

hello() ->
S = gs:start(),
Win = gs:create(window, S, [{width, 100}, {height, 50}]),
gs:create(label, Win, [{label, {text, "Hello, world!"}}]),
gs:config(Win, {map, true}),
receive
{gs, Win, destroy, _, _} ->
gs:stop()
end,
ok.

One way of invoking this would be to enter `hello_world:hello().` in the Erlang shell; another would be to run from a command line:

erl -noshell -run hello_world hello -run init stop

### Euphoria

MS-Windows only - basic.

include msgbox.e
if message_box("Hello, world!", "Hello", 0) then end if

MS-Windows only - using Win32Lib library

include win32lib.ew
createForm({
";Window; Hello",
";Label;  Hello, world!"

include w32start.ew

### F#

Using WindowsForms, at the F# interactive prompt:

let _ = System.Windows.Forms.MessageBox.Show("Hello, world!");;

### FLTK2 (in C++)

#include <fltk/Window.h>
#include <fltk/Widget.h>
#include <fltk/run.h>
using namespace fltk;

int main(int argc, char **argv)

Window *window = new Window(300, 180);
window->begin();
Widget *box = new Widget(20, 40, 260, 100, "Hello, world!");
box->box(UP_BOX);
box->labelfont(HELVETICA_BOLD_ITALIC);
box->labelsize(36);
box->labeltype(SHADOW_LABEL);
window->end();
window->show(argc, argv);

return run();

### G (LabVIEW)

PUBLIC SUB Main()
Message.Info("Hello, world!")
END

### Gtk# (in C#)

using Gtk;
using GtkSharp;
using System;

class Hello {

static void Main()

Application.Init ();

Window window = new Window("");
window.DeleteEvent += cls_evn;
Button close  = new Button ("Hello, world!");
close.Clicked += new EventHandler(cls_evn);

window.Add(close);
window.ShowAll();

Application.Run ();

static void cls_evn(object obj, EventArgs args)

Application.Quit();

### GTK+ 2.x (in Euphoria)

include gtk2/wrapper.e

Info(NULL,"Hello","Hello, world!")

### IOC/OCL (in IBM VisualAge for C++)

#include <iframe.hpp>
void main()

IFrameWindow frame("Hello, world!");
frame.showModally()

### Java Swing

import javax.swing.*;

class HelloWorld {

public static void main(final String[] args) {
JFrame frame = new JFrame();
frame.add(new JLabel("Hello World", SwingConstants.CENTER));
frame.setSize(200, 100);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

### Java with JavaFX and FXML files

package example;

public class FXMLDocumentController extends Application implements Initializable  {

@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();

@FXML
private Label label;

@Override
public void initialize(URL url, ResourceBundle rb) {
label.setText("Hello World!");

public static void main(String[] args) {
launch(args);

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" xmlns:fx="http://javafx.com/fxml/1" fx:controller="example.FXMLDocumentController">
<children>
<Label layoutX="126" layoutY="80" minHeight="16" minWidth="69" fx:id="label" />
</children>
</AnchorPane>

### Java with GTK (java-gnome)

import org.gnome.gdk.*;

class GdkSimple extends Window {

public GdkSimple() {
setTitle("Example");
connect((DeleteEvent)(source, event) -> {
Gtk.mainQuit();
return false;
});
add(new Label("Hello World"));
setDefaultSize(250, 150);
setPosition(WindowPosition.CENTER);
show();

public static void main(String[] args) {
Gtk.init(args);
new GdkSimple();
Gtk.main();

### K

This creates a window labeled "Hello, world!" with a button labeled "Hello, world!".

hello:hello..l:"Hello, world!"
hello..c:`button
`show$`hello

### Microsoft Foundation Classes (in C++)

#include <afx.h>
#include <afxwin.h>

class CHelloWin : public CWnd

protected:
DECLARE_MESSAGE_MAP()
afx_msg void OnPaint(void)

CPaintDC dc(this);
dc.TextOut(15, 3, TEXT("Hello, world!"), 13);

BEGIN_MESSAGE_MAP(CHelloWin, CWnd)
ON_WM_PAINT()
END_MESSAGE_MAP()

class CHelloApp : public CWinApp

virtual BOOL InitInstance();

CHelloApp theApp;
LPCTSTR wndClass;

BOOL CHelloApp::InitInstance()

CWinApp::InitInstance();
CHelloWin* hello = new CHelloWin();
m_pMainWnd = hello;
wndClass = AfxRegisterWndClass(CS_VREDRAW | CS_HREDRAW, 0, (HBRUSH)::GetStockObject(WHITE_BRUSH), 0);
hello->CreateEx(0, wndClass, TEXT("Hello MFC"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 120, 50, NULL, NULL);
hello->ShowWindow(SW_SHOW);
hello->UpdateWindow();
return TRUE;

### Adobe Flex MXML

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Label text="Hello, world!"/>
</mx:Application>

### NSIS

This creates a message box saying "Hello, world!".

OutFile "HelloWorld.exe"
Name "Hello, world!"
Caption "Hello, world!"

Section Hello, world!
SectionEnd

Function .onInit
MessageBox MB_OK "Hello, world!"
Quit
FunctionEnd

### OCaml

Uses lablgtk

let () =
let window = GWindow.window ~title:"Hello" ~border_width:10 () in
window#connect#destroy ~callback:GMain.Main.quit;
let button = GButton.button ~label:"Hello World" ~packing:window#add () in
button#connect#clicked ~callback:window#destroy;
window#show ();
GMain.Main.main ()

### OPL

(On Psion Series 3 and later compatible PDAs.)

PROC guihello:
ALERT("Hello, world!","","Exit")
ENDP

PROC hello:
dINIT "Window Title"
dTEXT "","Hello, world!"
dBUTTONS "OK",13
DIALOG
ENDP

### Pure Data

Patch as ASCII-art:

[Hello, world!(

[print]

Patch as sourcecode:

#N canvas 0 0 300 300 10;
#X msg 100 150 Hello, world!;
#X obj 100 200 print;
#X connect 0 0 1 0;

### Python

Using Tkinter:

from Tkinter import Tk, Label

root = Tk()
Label(root, text="Hello, world!").pack()

root.mainloop()

Using PyQt:

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

app = QApplication(sys.argv)
label = QLabel("Hello, World!")
label.show()
sys.exit(app.exec_())

Using PyGTK:

from gtk import *

label = Label("Hello, world!")
label.show()

window = Window()
window.add(label)
window.show()

main()

Using Curves:

from math import cos, sin

def f(x):
return int(round(96.75 + -21.98*cos(x*1.118) + 13.29*sin(x*1.118) + -8.387*cos(2*x*1.118)\
+ 17.94*sin(2*x*1.118) + 1.265*cos(3*x*1.118) + 16.58*sin(3*x*1.118)\
+ 3.988*cos(4*x*1.118) + 8.463*sin(4*x*1.118) + 0.3583*cos(5*x*1.118)\
+ 5.878*sin(5*x*1.118)))

print "".join([chr(f(x)) for x in range(12)])

Using Pygame:

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((512, 256), 0, 32)
f = pygame.font.SysFont(None, 32)
t = f.render("Hello, world!", True, (255, 255, 255))
tR = t.get_rect()
screen.blit(t, tR)
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
pygame.display.update()

### Qt toolkit (in C++)

#include <QApplication>
#include <QMessageBox>

int main(int argc, char * argv[])

QApplication app(argc, argv);
QMessageBox::information(0, "Qt4", "Hello World!");

#include <qapplication.h>
#include <qpushbutton.h>
#include <qwidget.h>
#include <iostream>

class HelloWorld : public QWidget

Q_OBJECT

public:
HelloWorld();
virtual ~HelloWorld();
public slots:
void handleButtonClicked();
QPushButton *mPushButton;

HelloWorld::HelloWorld() :
QWidget(),
mPushButton(new QPushButton("Hello, world!", this))

connect(mPushButton, SIGNAL(clicked()), this, SLOT(handleButtonClicked()));

HelloWorld::~HelloWorld() {}

void HelloWorld::handleButtonClicked()

std::cout << "Hello, world!" << std::endl;

int main(int argc, char *argv[])

QApplication app(argc, argv);
HelloWorld helloWorld;
app.setMainWidget(&helloWorld);
helloWorld.show();
return app.exec();

#include <QApplication>
#include <QPushButton>
#include <QVBoxLayout>

int main(int argc, char *argv[])

QApplication app(argc, argv);

QWidget *window = new QWidget;
QVBoxLayout *layout = new QVBoxLayout(window);
QPushButton *hello = new QPushButton("Hello, world!", window);

//connect the button to quitting
hello->connect(hello, SIGNAL(clicked()), &app, SLOT(quit()));

layout->addWidget(hello);
layout->setMargin(10);
layout->setSpacing(10);

window->show();

return app.exec();

### Rebol

view layout [text "Hello, world!"]

### Red

view [text "Hello, world!"]

### Robotic (MegaZeux)

* "Hello, world!"
end

### RPL

(On Hewlett-Packard HP-48G and HP-49G series calculators.)

<< "Hello, world!" MSGBOX >>

### RTML

Hello ()
TEXT "Hello, world!"

### Ruby with WxWidgets

require 'wxruby'

class HelloWorldApp < Wx::App
def on_init
ourFrame = Wx::Frame.new(nil, -1, "Hello, world!").show
ourDialogBox = Wx::MessageDialog.new(ourFrame, "Hello, world!", "Information:", \
Wx::OK|Wx::ICON_INFORMATION).show_modal
end
end

HelloWorldApp.new.main_loop

### Ruby with GTK+

require 'gtk2'

Gtk.init
window = Gtk::Window.new
window.signal_connect("delete_event") { Gtk.main_quit; false }
button = Gtk::Button.new("Hello, world!")
button.signal_connect("clicked") { Gtk.main_quit; false }
window.add(button)
window.show_all
Gtk.main

### Ruby with Tk

require 'tk'

window = TkRoot.new { title 'Hello, world!' }
button = TkButton.new(window) {
text 'Hello, world!'
command proc { exit }
pack

Tk.mainloop

### Smalltalk

Evaluate in a workspace:

Dialog confirm: 'Hello, world!'

Using the Morphic GUI toolkit of Squeak Smalltalk:

('Hello, world!' asMorph openInWindow) submorphs second color: Color black

Using wxSqueak:

Wx messageBox: 'Hello, world!'

### SWT with Java

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Label;
public class SWTHello {
public static void main (String [] args) {
Display display = new Display ();
final Shell shell = new Shell(display);
RowLayout layout = new RowLayout();
layout.justify = true;
layout.pack = true;
shell.setLayout(layout);
shell.setText("Hello, world!");
Label label = new Label(shell, SWT.CENTER);
label.setText("Hello, world!");
shell.pack();
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();

display.dispose ();

### Tk

label .l -text "Hello, world!"
pack .l

and the same in one line

pack [label .l -text "Hello, world!"]

### Tcl with Tk

package require Tk
tk_messageBox -message "Hello, world!"

package require Tk
pack [button .b -text "Hello, world!" -command exit]

### Ubercode

Ubercode 1 class Hello
public function main()
code
call Msgbox("Hello", "Hello, world!")
end function
end class

### Uniface

message "Hello, world!"

### Virtools

void main ()

String s = "Hello World.";
bc.OutputToConsole (s);

### VBA

Sub Main()
MsgBox "Hello, world!"
End Sub

### Visual Basic .NET 2003/2005

Private Sub Form_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
MessageBox.Show("Hello, world!")
Me.Close()
End Sub

Note that the previous example will only work when the code is entered as part of a Form Load Event, such as the one created by default when generating a new project in the Visual Studio programming environment. Equivalently, the following code is roughly equivalent to the traditional Visual Basic 6 code by disabling the Application Framework and setting 'Sub Main' as the entry point for the application:

Public Module MyApplication
Sub Main()
MessageBox.Show("Hello, world!")
End Sub
End Class

or using a class;

Public Class MyApplication
Shared Sub Main()
MessageBox.Show("Hello, world!")
End Sub
End Class

### Visual Prolog (note box)

#include @"pfc\vpi\vpi.ph"

goal
vpiCommonDialogs::note("Hello, world!").

### Windows API (in C)

This uses the Windows API to create a full window containing the text.

Name: Win32 example
Copyright: GLP
Author: Ryon S. Hunter
Date: 20/03/07 17:11
Description: This is an example of what a Win32 hello world looks like.

#include <windows.h>
#define APPTITLE "Win32 - Hello world"

BOOL InitInstance(HINSTANCE,int);
ATOM MyRegisterClass(HINSTANCE);
LRESULT CALLBACK WinProc(HWND,UINT,WPARAM,LPARAM);

LRESULT CALLBACK WinProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

PAINTSTRUCT ps;
COLORREF c = RGB( 0, 0, 0 );
HDC hdc;
RECT rt;
switch(message)

case WM_DESTROY: // Exit the window? Ok
PostQuitMessage(0);
break;
case WM_PAINT:
GetClientRect( hWnd, &rt );
hdc = BeginPaint( hWnd, &ps );
DrawText( hdc, "Hello world!", sizeof( "Hello world!" ), &rt, DT_CENTER );
EndPaint( hWnd, &ps );
break;

return DefWindowProc(hWnd,message,wParam,lParam);

ATOM MyRegisterClass(HINSTANCE hInstance)

WNDCLASSEX wc;
wc.cbSize = sizeof( WNDCLASSEX );
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC)WinProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = 0;
wc.hIcon = NULL;
wc.hCursor = LoadCursor( NULL, IDC_ARROW );
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = APPTITLE;
wc.hIconSm = NULL;

return RegisterClassEx(&wc);

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)

HWND hWnd;
hWnd = CreateWindow( // Create a win32 window
APPTITLE,
APPTITLE,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
500,
400,
NULL,
NULL,
hInstance,
NULL);
if(!hWnd) return FALSE;
ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );
return TRUE;

int WINAPI WinMain( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow )

MSG msg;
MyRegisterClass(hInstance);
if(!InitInstance( hInstance,nCmdShow) )
return 1;
while( GetMessage( &msg, NULL, 0, 0 ) )

TranslateMessage( &msg );
DispatchMessage( &msg );

return msg.wParam;

### Xojo

In the Open event handler of the default window:

MsgBox("Hello world!")

### XUL

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
<window id="yourwindow" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<label value="Hello, World!"/>
</window>

### Maple

with(Maplets):
with(Maplets[Elements]):
maplet := Maplet( "Hello world!" ):
Display( maplet );

## Document formats

### ASCII

The following sequence of characters, expressed in hexadecimal notation (with carriage return and newline characters at end of sequence):

48 65 6C 6C 6F 2C 20 77 6F 72 6C 64 21 0D 0A

The following sequence of characters, expressed as binary numbers (with cr/nl as above, and the same ordering of bytes):

00-07: 01001000 01100101 01101100 01101100 01101111 00101100 00100000 01110111
08-0E: 01101111 01110010 01101100 01100100 00100001 00001101 00001010

## Page description languages

### XHTML 1.1

(Using UTF-8 character set.)

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Hello, world!</title>
</head>
<body>
<p>Hello, world!</p>
</body>
</html>

### HTML

#### Simple

<html>
<body>
Hello, world!
</body>
</html>

#### Informal

The <html> and <body> tags are not necessary for informal testing. Simply write it as text without tags.

Hello, world!

#### HTML 4.01 Strict (full)

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Hello, world!</title>
</head>
<body>
<p>Hello, world!</p>
</body>
</html>

The first paragraph of the W3C Recommendation on The global structure of an HTML document also features this example.

#### HTML 4.01 Strict (smallest)

This is the smallest legal version, leaving out all optional tags

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN">
<title>Hello, world!</title>
<p>Hello, world!

#### HTML 5

<!DOCTYPE html>
<html>
<head>
<title>Hello, World!</title>
</head>
<body>
<h1>Hello, world!</h1>
</body>
</html>

### MediaWiki/Wikitext

Hello, World!

### PDF

%PDF-1.0
1 0 obj

/Type /Catalog
/Pages 3 0 R
/Outlines 2 0 R

endobj
2 0 obj

/Type /Outlines
/Count 0

endobj
3 0 obj

/Type /Pages
/Count 1
/Kids [4 0 R]

endobj
4 0 obj

/Type /Page
/Parent 3 0 R
/Resources << /Font << /F1 7 0 R >>/ProcSet 6 0 R

/MediaBox [0 0 612 792]
/Contents 5 0 R

endobj
5 0 obj
<< /Length 44 >>
stream

/F1 24 TF
100 100 Td (Hello, world!) Tj

endstream
endobj
6 0 obj
[/PDF /Text]
endobj
7 0 obj

/Type /Font
/Subtype /Type1
/Name /F1
/BaseFont /Helvetica
/Encoding /MacRomanEncoding

endobj
xref
0 8
0000000000 65535 f
0000000009 00000 n
0000000074 00000 n
0000000120 00000 n
0000000179 00000 n
0000000322 00000 n
0000000415 00000 n
0000000445 00000 n
trailer

/Size 8
/Root 1 0 R

startxref
553
%%EOF

This is a valid PDF only if the text file has CRLF line endings.

### PostScript

% Displays on console.
(Hello, world!) =

% Displays as page output.
/Courier findfont
24 scalefont
setfont
100 100 moveto
(Hello, world!) show
showpage

### RTF

{\rtf1\ansi\deff0
{\fonttbl {\f0 Courier New;}}
\f0\fs20 Hello, world!

### SVG

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" width="200" height="100">
<text x="50" y="50">Hello, world!</text>
</svg>

### TeX

Hello, world!
\bye

### LaTeX 2ε

\documentclass{article}
\begin{document}
Hello, world!
\end{document}

### ConTeXt

\starttext
Hello, world!
\stoptext

## Media-based scripting languages

### AviSynth

BlankClip()
Subtitle("Hello, world!")

(Creates a video with default properties)

### Lingo (Macromedia Director scripting language)

on exitFrame me
put "Hello, world!"
end

Outputs the string to the message window if placed in a single movie frame. Alternatively, to display an alert box stating the message you could use

on exitFrame me
alert "Hello, world!"
end

### POV-Ray

#include "colors.inc"
camera {
location <3, 1, -10>
look_at <3,0,0>

light_source { <500,500,-1000> White }
text {
ttf "timrom.ttf" "Hello, world!" 1, 0
pigment { White }

## Esoteric programming languages

This page shows the Hello, world! program in esoteric programming languages — that is, working programming languages that were designed as experiments or jokes and were not intended for serious use.

### 0815

<:48:x<:65:=<:6C:$=$=$$~<:03:+$<:2c:~$~<:c:x-$<:77:
~$~<:8:x-$~<:03:+$~<:06:x-$x<:0e:x-$=x<:43:x-$

### Alef++

use java.lang.*;
main

System->out->println[ 'Hello, world!' ];

### Arrow

■→→■↓■←■←■↓■→→■  /* makes H */
→→■↓■↑↑↑■        /* makes I */

### Befunge

"!dlrow olleH">v

^_@

v v"Hello, world!!"<
>                  ^
> >:#v_@
^   .<

0"!dlrow olleH">,:#<_@

### Binary lambda calculus

As documented at http://www.ioccc.org/2012/tromp/hint.html (any of the 16 ASCII characters from ' ' to '/' can be used at the start)

!Hello, world

### BlooP, FlooP

From Eric Raymond's interpreter package (changed to use upper case as in the book).

DEFINE PROCEDURE ''HELLO-WORLD''[N]:
BLOCK 0: BEGIN
PRINT['Hello, world!'];
BLOCK 0: END.

### brainfuck

+++++ +++++             initialize counter (cell #0) to 10
[                       use loop to set the next four cells to 70/100/30/10
> +++++ ++              add  7 to cell #1
> +++++ +++++           add 10 to cell #2
> +++                   add  3 to cell #3
> +                     add  1 to cell #4
<<<< -                  decrement counter (cell #0)

> ++ .                  print 'H'
> + .                   print 'e'
+++++ ++ .              print 'l'
.                       print 'l'
+++ .                   print 'o'
> ++ .                  print ' '
<< +++++ +++++ +++++ .  print 'W'
> .                     print 'o'
+++ .                   print 'r'

-- - .               print 'l'

-- 
 .             print 'd'
> + .                   print '!'
> .                     print '\n'

### Chef

Hello, world! Souffle by David Morgan-Mar.

Hello World Souffle.

This recipe prints the immortal words "Hello world!", in a basically brute force way. It also makes a lot of food for one person.

Ingredients.
72 g haricot beans
101 eggs
108 g lard
111 cups oil
32 zucchinis
119 ml water
114 g red salmon
100 g dijon mustard
33 potatoes

Method.
Put potatoes into the mixing bowl.
Put dijon mustard into the mixing bowl.
Put lard into the mixing bowl.
Put red salmon into the mixing bowl.
Put oil into the mixing bowl.
Put water into the mixing bowl.
Put zucchinis into the mixing bowl.
Put oil into the mixing bowl.
Put lard into the mixing bowl.
Put lard into the mixing bowl.
Put eggs into the mixing bowl.
Put haricot beans into the mixing bowl.
Liquefy contents of the mixing bowl.
Pour contents of the mixing bowl into the baking dish.

Serves 1.

Later Mike Worth wrote tastier and actually functional recipe.

Hello World Cake with Chocolate sauce.

This prints hello world, while being tastier than Hello World Souffle. The main
chef makes a " world!" cake, which he puts in the baking dish. When he gets the
sous chef to make the "Hello" chocolate sauce, it gets put into the baking dish
and then the whole thing is printed when he refrigerates the sauce. When
actually cooking, I'm interpreting the chocolate sauce baking dish to be
separate from the cake one and Liquify to mean either melt or blend depending on
context.

Ingredients.
33 g chocolate chips
100 g butter
54 ml double cream
2 pinches baking powder
114 g sugar
111 ml beaten eggs
119 g flour
32 g cocoa powder
0 g cake mixture

Cooking time: 25 minutes.

Pre-heat oven to 180 degrees Celsius.

Method.
Put chocolate chips into the mixing bowl.
Put butter into the mixing bowl.
Put sugar into the mixing bowl.
Put beaten eggs into the mixing bowl.
Put flour into the mixing bowl.
Put baking powder into the mixing bowl.
Put cocoa  powder into the mixing bowl.
Stir the mixing bowl for 1 minute.
Combine double cream into the mixing bowl.
Stir the mixing bowl for 4 minutes.
Liquify the contents of the mixing bowl.
Pour contents of the mixing bowl into the baking dish.
bake the cake mixture.
Wait until baked.
Serve with chocolate sauce.

chocolate sauce.

Ingredients.
111 g sugar
108 ml hot water
108 ml heated double cream
101 g dark chocolate
72 g milk chocolate

Method.
Clean the mixing bowl.
Put sugar into the mixing bowl.
Put hot water into the mixing bowl.
Put heated double cream into the mixing bowl.
dissolve the sugar.
agitate the sugar until dissolved.
Liquify the dark chocolate.
Put dark chocolate into the mixing bowl.
Liquify the milk chocolate.
Put milk chocolate into the mixing bowl.
Liquify contents of the mixing bowl.
Pour contents of the mixing bowl into the baking dish.
Refrigerate for 1 hour.

### False

"Hello, World!

The newline before the terminating quote mark is necessary.

### HQ9+

### INTERCAL programming language

PLEASE DO ,1 <- #13
DO ,1 SUB #1 <- #238
DO ,1 SUB #2 <- #112
DO ,1 SUB #3 <- #112
DO ,1 SUB #4 <- #0
DO ,1 SUB #5 <- #64
DO ,1 SUB #6 <- #238
DO ,1 SUB #7 <- #26

DO ,1 SUB #8 <- #248
DO ,1 SUB #9 <- #168
DO ,1 SUB #10 <- #24
DO ,1 SUB #11 <- #16
DO ,1 SUB #12 <- #158
DO ,1 SUB #13 <- #52
PLEASE READ OUT ,1
PLEASE GIVE UP

### LOLCODE

HAI;
CAN HAS STDIO?;
VISIBLE "Hello, World!";
KTHXBYE;

### Malbolge programming language

(=<`:9876Z4321UT.-Q+*)M'&%$H"!~}|Bzy?=|{z]KwZY44Eq0/{mlk**hKs_dG5[m_BA{?-Y;;Vb'rR5431M}/.zHGwEDCBA@98\6543W10/.R,+O<

### P programming language

"Hello, world!\n"

### Perl

Not really an esoteric language, but this code uses obfuscation:

qq chop lc and print chr ord uc q chop uc and print chr ord q ne sin and
print chr ord qw q le q and print chr ord q else and print chr ord q pop
and print chr oct oct ord uc qw q bind q and print chr ord q q eq and print
chr ord qw q warn q and print chr ord q pop and print chr ord q qr q and
print chr ord q else and print chr ord qw q do q and print chr hex length
q q semctl setpgrp chop q

### Piet

Piet programming language . using only colors.

Hello world in piet (see from 41:40 minute on "The Art of Code" on YouTube)

### Rockstar

Shout "Hello, world!"

### Shakespeare

The Infamous Hello World Program.

Romeo, a young man with a remarkable patience.
Juliet, a likewise young woman of remarkable grace.
Ophelia, a remarkable woman much in dispute with Hamlet.
Hamlet, the flatterer of Andersen Insulting A/S.

Act I: Hamlet's insults and flattery.

Scene I: The insulting of Romeo.

[Enter Hamlet and Romeo]

Hamlet:
You lying stupid fatherless big smelly half-witted coward!
You are as stupid as the difference between a handsome rich brave
hero and thyself! Speak your mind!

You are as brave as the sum of your fat little stuffed misused dusty
old rotten codpiece and a beautiful fair warm peaceful sunny summer's
day. You are as healthy as the difference between the sum of the
sweetest reddest rose and my father and yourself! Speak your mind!

You are as cowardly as the sum of yourself and the difference
between a big mighty proud kingdom and a horse. Speak your mind.

Speak your mind!

[Exit Romeo]

Scene II: The praising of Juliet.

[Enter Juliet]

Hamlet:
Thou art as sweet as the sum of the sum of Romeo and his horse and his
black cat! Speak thy mind!

[Exit Juliet]

Scene III: The praising of Ophelia.

[Enter Ophelia]

Hamlet:
Thou art as lovely as the product of a large rural town and my amazing
bottomless embroidered purse. Speak thy mind!

Thou art as loving as the product of the bluest clearest sweetest sky
and the sum of a squirrel and a white horse. Thou art as beautiful as
the difference between Juliet and thyself. Speak thy mind!

[Exeunt Ophelia and Hamlet]

Act II: Behind Hamlet's back.

Scene I: Romeo and Juliet's conversation.

[Enter Romeo and Juliet]

Romeo:
Speak your mind. You are as worried as the sum of yourself and the
difference between my small smooth hamster and my nose. Speak your
mind!

Juliet:
Speak YOUR mind! You are as bad as Hamlet! You are as small as the
difference between the square of the difference between my little pony
and your big hairy hound and the cube of your sorry little
codpiece. Speak your mind!

[Exit Romeo]

Scene II: Juliet and Ophelia's conversation.

[Enter Ophelia]

Juliet:
Thou art as good as the quotient between Romeo and the sum of a small
furry animal and a leech. Speak your mind!

Ophelia:
Thou art as disgusting as the quotient between Romeo and twice the
difference between a mistletoe and an oozing infected blister! Speak
your mind!

[Exeunt]

### SNUSP

/e+++++++++++++++++++++++++++++.\
./\/\/\  /+++\!>.+++o.l.+++++++l/                  #/?\
$H!\++++++\ +   \comma.

 .<w++++++++.\ /?\<!\-/
/++++++/ +/\                      /.

--o/ \-/!.++++++++++/?\n
/=\++++++\ +\\!=++++++\             \r+++.l

.d

--.>+.!\-/
\!\/\/\/\/ \++++++++++/

Modular SNUSP:

/@@@@++++#               #+++@@\                #
--@@@\n
$@\H.@/e.+++++++l.l.+++o.>>++++.< .<@/w.@\o.+++r.++@\l.@\d.>+.@/.#
\@@@@=>++++>+++++<<@+++++#       #
@@/!=========/!==/

### Spoon (programming language)

1111110010001011111111111101100000110100010100101111111111001000101111111111011000001101 0100101011111110010100010101110010100101111001000101111111111101100000110100010100111110 0100010000000000000011000001101000101001101101101101111100100010111110110000011010001010 0100100010101110010100000000000000000000010100000000000000000000000000010100100101001010

### Super NAND Time!!

12 (32 35 37 38 42)
13 (35 37 38 39 43)
14 ((31 36 39 42 43))
15 (31 33 34 35 38 40 43)
16 (37 39)
17 ((31 43))
18 ((36 42 43))
20 ((42(43)))
21 44
31 ((31)(44))
32 (32(31))
33 (33(32))
34 (34(33))
35 (35(34))
36 (36(35))
37 (37(36))
38 (38(37))
39 (39(38))
40 (40(39))
41 (41(40))
42 (42(41))
43 (43(42))
44 1

### Taxi programming language

"Hello, World!" is waiting at the Writer's Depot.
Go to Writer's Depot: west 1st left, 2nd right, 1st left, 2nd left.
Pickup a passenger going to the Post Office.
Go to the Post Office: north 1st right, 2nd right, 1st left.
Go to the Taxi Garage: north 1st right, 1st left, 1st right.

### T programming language

�gin @jump $main
%main.0 @echo %msg
%main.1 @end
%main.count 2
%msg Hello, world!

### This=That

x=Hello,world!
x=print

### Unlambda programming language

`r```````````.H.e.l.l.o. .w.o.r.l.di

### Var'aq programming language

Note: actually prints "What do you want, universe?" in Klingon.

~ nuqneH { ~ 'u' ~ nuqneH disp disp } name
nuqneH

### Whitespace

Note that whitespace has been highlighted (Space, Tab)

empty-line

empty-line

empty-line

empty-line

empty-line

empty-line
empty-line/EOF

### XS programming language

<print>Hello, world!</print>

### Ya programming language

@HelloWorld.Ya;
using <stdio.h>;
$int($char[][] args) main
printf("Hello, %s!\n", args.Length > 1 ? args[1] : "World");
return 0;

### DUNNBOL1

A code language that draws in binary on a braille plotter.

BGN GRPLOT BIN
DRAWPLOT

0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0011100111001111111001110000000011100000000001111100000000001000001000011111000001111100000100000000011111110000
0001000010000100001000100000000001000000000010000010000000001000001000100000100010000010000100000000010000001000
0001000010000100000000100000000001000000000010000010000000001000001000100000100010000010000100000000010000001000
0001111110000111100000100000000001000000000010000010000000001001001000100000100011111110000100000000010000001000
0001000010000100000000100000000001000000000010000010000000001011101000100000100010000001000100000000010000001000
0001000010000100001000100000000001000000000010000010000000001100011000100000100010000000100100000000010000001000
0011100111001111111001111111100011111111000001111100000000001000001000011111000010000000100111111100011111110000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

ENDDRAW
END

### SM

The OO language looks like C.

use System.Windows.Forms;

class HelloWorld extends System.Windows.Forms

protected:
String hw;
construct HelloWorld()

this.hw = 'Hello, world!';

public void function show()

MessageBox.show(this.hw, '');

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