#include <stdio.h>

int main(int argc, char* argv[])
{
    printf("Hello World!");

    return 0;
}

#include <stdio.h>
#include <stdlib.h>

#define EMPTY_NODE ((node*)NULL)
#define LIST_OK 0
#define LIST_ERROR -1

typedef struct _node {
    int data;
    struct _node* next;
} node;

node* new_node(int data) {
    node* n = (node*)malloc(sizeof(node));
    n->data = data;
    n->next = EMPTY_NODE;
}

int reverse(node** head) {
    node* current = *head;
    node* previous = EMPTY_NODE;
    node* next;

    while (current) {
        next = current->next;
        current->next = previous;
        previous = current;
        current = next;
    }

    *head = previous;

    return LIST_OK;
}

int main() {
    printf("Hello, world\n");

    node* a = new_node(9);
    return 0;
}

#include <cstdio>

int main(int argc, char* argv[])
{
    printf("Hello World!");

    return 0;
}

int sum(int i, int j, int k)
{
  return i+j;
}
int main()
{
 cout<<"Hello World"<<endl;
 sum(5,6,8);
}

import std.stdio;

int main()
{
	writefln("Hello world");
	
	return 0;
}

void main()
{
  printf("Hello world!\n");
}

main = putStrLn "Hello World!"

main = putStrLn "Hello World!"

print("Hello World")

print "hello world"

print_string "Hello World!\n";;

 print_endline "Hello, world!"

<? echo "Hello World" ?>

<?php echo 'hello world'?>

#!/usr/bin/perl

print "Hello World!\n";

use strict;
use warnings;

print "Hello, world!\n";

print "Hello, world!"

print "Hello World"

puts "Hello World"

puts "Hello world"

(display "hello, world")

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

puts -nonewline "Hello world!"
set a 10
expr $a + 1
set y [expr $a + 1]

puts -nonewline "Hello world!"
set a 10
expr $a + 1
set y [expr $a + 1]