编程第一课：如何用12种最受欢迎的编程语言输出“Hello，World！”？

class HelloWorld
{
  public static void main(String[] args)
  {
    System.out.println("Hello World!!");
  }
}

#include<stdio.h>

int main(void){
  printf("Hello, world!");
  return 0;
}

print('Hello World')

#include <iostream>
using namespace std;

int main(){
    cout <<"\nHello World"<< endl;
    return 0;
}

using System;

namespace helloWorld
{
    class HelloWorld
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}

Module HelloWorld
   Sub Main( )
      System.Console.WriteLine("Hello world!")
   End Sub
End Module

console.log("Hello World");

<?php
  // In PHP, we use echo to print text
  echo "Hello World";
  // If you want to print in browser's console, we use print_r
  print_r("Hello World");
  // if you want the variable data types as well use var_dump
  $stringVar = 'hello world';
  var_dump($stringVar);
?>

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSLog(@"Hello World!");
    }
    return 0;
}

SELECT 'Hello World';
PRINT 'Hello World';

puts 'Hello World'

fprintf ( 1, 'Hello, world!' );

quit