C++:
#include <iostream>

#include <ostream>



int main()

{

	std::cout << "Hallo Welt!" << std::endl;

}


C#:
class MainClass

{

	public static void Main()

	{

		System.Console.WriteLine("Hallo Welt!");

	}

}


Java:
public class Hallo

{

	public static void main(String[] args)
	{

		System.out.println("Hallo Welt!");
	}

}


Pascal:
program HalloWelt;

{$APPTYPE CONSOLE}



begin

	writeln('Hallo Welt!');

end.


PHP:
<?php

	echo "Hallo Welt!";

?>