Hello world!

#include <stdio.h>
 
int main() {
  printf("Hello world!\n");
 
  return 0;
}

c++

#include <iostream>
 
int main() {
  std::cout << "Hello world!"<< std::endl;
 
  return 0;
}

bash

1 2	#!/bin/bash echo "Hello world!"

ruby

1	puts("Hello world!")

javascript (courtesy of Theo Keeler)

1
2
3

<script type="text/javascript">// <![CDATA[
document.write(“Hello World!”);
// ]]></script>

php (courtesy of Theo Keeler)

1	<!--?php echo “Hello World!”; ?-->

python (courtesy of DJ)

1	print(“Hello World!”)

java (courtesy of DJ)

public class HelloWorld {
  public static void main(String[] args) {
    System.out.println(“Hello World!”);
  }
}

windows batch (courtesy of Wendell)

1 2	@echo off echo Hello World!

Racket/Scheme (courtesy of DJ)

1 2	#lang racket (display "Hello World!")

C# (courtesy of DJ)

public class HelloWorld {
  public static void Main(string[] args) {
    System.Console.WriteLine("Hello world!");
  }
}

Latex (courtesy of Rob)

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

Help me make the definitive list — leave me your “Hello World!” program from your favorite programming language!