Hello.py

Python and Swift:
print("Hello, world!")


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


JavaScript:
console.log("Hello, world!");


C:
#include <stdio.h>
int main() {
    printf("Hello, world!\n");
    return 0;
}


C++:
#include <iostream>
int main() {
    std::cout << "Hello, world!" << std::endl;
    return 0;
}


Ruby:
puts "Hello, world!"


Go:
package main
import "fmt"
func main() {
    fmt.Println("Hello, world!")
}


C#:
using System;
class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, world!");
    }
}


PHP:
<?php
echo "Hello, world!";
?>


R:
cat("Hello, world!\n")


Kotlin
fun main() {
    println("Hello, world!")
}

Rust:
fn main() {
    println!("Hello, world!");
}