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

#include <stdio.h>

void main( void )
{
  int ar[10] = {0};
  printf("Hello world");
}

//hi earth
#include <iostream>
int main () 
{
std::cout << "Hello World";
} 

#include <iostream>

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

main :: IO ()
main = do
  putStrLn "Hello World!"

main :: IO ()
main = putStrLn "hello world"

print ("Hello World");

print ("Hello World")

<?php
function writeMsg() {
    echo "Hello world!";
}

writeMsg(); // call the function
?>

<?php

echo 'hello world';

print "Hello, World!\n";

print "Hello world";

print('hello world')

print 'hello world'

printf("Hello world")

printf("Hello world")

(display "hello world")

(display "Hello, World!")