Hello World

#!/bin/sh
echo "Hello World!"

#!/usr/bin/env python
print("Hello World!")

#include <stdio.h>
int main()
{
    printf("Hello World!\n");

}

#include <iostream>
using namespace std;
int main()

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

#if 0
gcc -o hello hello.sh
#endif
#include <stdio.h>

int main()
{
    printf("Hello World!\n");
}