hello world

本人精通各种编程语言

的 Hello world

1. Java

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

2. C

#include<stdio.h>

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

3. Python

print('Hello World')

4. C++

#include <iostream>
using namespace std;

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

5. C#

using System;

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

6.SQL

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

7. JavaScript

console.log("Hello World");

8. PHP

<?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);
?>