Hello world!

A "Hello, World!" program generally is a computer program that outputs or displays the message "Hello, World!". Such a program is very simple in most programming languages, and is often used to illustrate the basic syntax of a programming language. It is often the first program written by people learning to code. [1]

This list contains programs along with instructions for Unix Shell environment.

1. Ada
2. C
3. C#
4. C++
5. Dart
6. F#
7. Go
8. Haskell
9. JavaScript
10. Kotlin
11. Objective-C
12. Perl
13. Python
14. R
15. Ruby
16. Rust
17. Scala
18. Shell
19. Swift
20. Visual Basic

Ada

with Text_IO; use Text_IO;

procedure hello is
begin
   Put_Line("Hello world!");
end hello;

$ gnatmake hello-world.adb

$ ./hello-world

C

#include <stdio.h>

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

$ make hello-world

$ ./hello-world

C

using System;

class Pogram
{
    static void Main(string[] argv)
    {
        Console.WriteLine("Hello world!");    
    }
}

$ csc hello-world.cs

$ mono hello-world.exe

C++

#include <iostream>

int main(void)
{
    std::cout << "Hello world\n";
    return 0;
}

$ g++ -o hello-world hello-world.cpp

$ ./hello-world

Dart

void main()
{
    print("Hello world!");
}

$ dart hello-world.dart

F

open System

[<EntryPoint>]
let main argv =
    printfn "Hello world!"
    0 

$ fsharpc hello-world.fs

$ mono hello-world.exe

Go

package main

import "fmt"

func main()
{
    fmt.Println("Hello world!")
}

$ go run hello-world.go

Haskell

main :: IO ()
main = do
    putStrLn "Hello world!"
    return ()

$ ghc hello-world.hs

./hello-world

Java

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

$ javac hello-world.java

$ java hello-world

JavaScript

console.log("Hello world!");

$ node hello-world.js

Kotlin

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

$ kotlinc hello-world.kt -include-runtime -d hello-world.jar

$ java -jar hello-world.jar

Objective-C

#import <Foundation/Foundation.h>

int main(void) 
{
    NSLog(@"Hello world!");
    return 0;
}

$ clang -framework Foundation hello-world.m -o hello-world

$ ./hello-world

Perl

#!usr/bin/perl

use warnings;

print("Hello world!\n");

$ perl hello-world.pl

Python

print('Hello world!')

$ python3 hello-world.py

R

print("Hello world!", quote=False)

$ chmod +x hello-world.r

./hello-world.r

Ruby

puts "Hello world!"

$ ruby hello-world.rb

Rust

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

$ rustc hello-world.rs

$  ./hello-world

Scala

object Main {
  def main(args: Array[String]): Unit = {
    println("Hello world!")
  }
}

scala hello-world.scala

Shell

echo "Hello world!"

$ sh hello-world.sh

Swift

print("Hello world!")

$ swift hello-world.swift

Visual Basic

Imports System

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

$ vbc hello-world.vb

$ mono hello-world.exe

Assembly

global    start
    section   .text
start:
    mov       rax, 0x02000004
    mov       rdi, 1
    mov       rsi, message
    mov       rdx, 13
    syscall
    mov       rax, 0x02000001
    xor       rdi, rdi
    syscall 
    section   .data
message:  
    db        "Hello world!", 10

$ ./hello-world