C
#include <stdio.h>
int main()
{
printf("Hello World!");
return 0;
}
C++
#include <iostream>
using namespace std;
int main()
{
cout << "Hello World!" << endl;
return 0;
}
C#
using System;
class HelloWorld
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
Java
public class HelloWorld {
public static void main(String[] args) {
System.out.print("Hello World!");
}
}
Java 21+
// Java 21 新特性
// javac --release 21 --enable-preview HelloWorld.java
// java --enable-preview HelloWorld
void main() {
System.out.println("Hello World!");
}
PHP
<?php echo "Hello World!"; ?>
HTML
<!DOCTYPE html>
<html>
<head>
<title>Hello World!</title>
</head>
<body>
<p>Hello World!</p>
</body>
</html>
Python
print("Hello, World!")
Rust
fn main() {
println!("Hello World!");
}
Lua
print("Hello World!")
Kotlin
class HelloWorld {
fun main(args: Array<String>) {
println("hello World!")
}
}
Shell
echo "Hello World!"
