#include "stdio.h"
void main()
{
printf("Hello world!");
}

#include <stdio.h>

int main()
{
   /* 我的第一个 C 程序 */
   printf("Hello, World! \n");
   
   return 0;
}

#include <iostream>
using namespace std;

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

#include <iostream>
using namespace std;

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

main = putStrLn "hello world"

main = putStrLn "Hello, world!"

print("Hello, world!")

print("Hello World")

print_endline "Hello, World!"

print_string "Hello, world"

<?php
 echo 'Hello World';
?>

<?php
 echo "Hello World";
?>

print "Hello world";

print "Hello world";

print ("Hello World")

print('Hello world!')

puts "Hello world!"

print "Hello World"

(display "Hello, World!")

;The first program

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