#include <stdio.h>
int main(void){
printf("hello world");
return 0;
}

#include "stdio.h"
int main()
{
    printf("hello world");
    return 0;
}

#include <iostream>
#include <string>

using namespace std;

int main(){

    cout << "Hello World!"<< endl;
}

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

import std.stdio;

void main()
{
    printf("Hello, World!");
}

int main(){
printf("Hello World!");
return 0;
}

main = putStrLn "hello world"

main = putStrLn "hello world"

print("Hello world!")

print("Hello, world!")

print_string "hello world!\n";;

let hello = "Hello" ;;
let world = "world" ;;
Printf.printf "%s %s!" hello world ;;

<?php
$str = "Hello World";
echo str_pad($str,-1,"_",STR_PAD_LEFT);
?>

<?php
$str = "Hello World";
echo str_pad($str,0,"_",STR_PAD_LEFT);
?>

$str = "\Uhello, world!";
print "$str";

#!/usr/bin/perl

# Function definition
sub Hello{
   print "Hello, World!\n";
}

# Function call
Hello();

print('Hello, world')

#!/usr/bin/python
print "Hello, World!"

print "Hello, World!\n"

class A 
    attr_accessor :a
    def initialize(a) 
        @a = a
    end
end

aa = A.new("hello, world!")
puts aa.a

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

(begin
  (display "Hello, world!"))

set hello "Hello, World!"
puts -nonewline $hello ;