hello-world

各种语言输出: hello world

C

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#include <stdio.h>

int main()
{
    printf("Hello World!");
    return 0;
}

C++

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#include <iostream>
using namespace std;

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

C#

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using System;

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

Java

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

Java 21+

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// Java 21 新特性
// javac --release 21 --enable-preview HelloWorld.java
// java --enable-preview HelloWorld
void main() {
    System.out.println("Hello World!");
}

PHP

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<?php echo "Hello World!"; ?>

HTML

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<!DOCTYPE html>
<html>
    <head>
        <title>Hello World!</title>
    </head>

    <body>
        <p>Hello World!</p>
    </body>
</html>

Python

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print("Hello, World!")

Rust

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fn main() {
    println!("Hello World!");
}

Lua

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print("Hello World!")

Kotlin

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class HelloWorld {
    fun main(args: Array<String>) {
        println("hello World!")
    }
}

Shell

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echo "Hello World!"