Hello World

Hello, World!

This seemed like an appropriate first post for a blog about scripting and programming (and Unix in general) since that is the first program anyone learns to write in a computer language.

If I told you the frustrating, tedious story behind how this post’s tags caused an enormous issue that broke the site and took hours to fix, you would appreciate why I chose the insane sysadmin as my mascot! Suffice to say, I’m glad it’s working finally.

I think we’ve all found ourselves chasing down weird bugs that make us want to rip our hair out and pound on the keyboard in frustration. That’s kind of why I created this page. I want to offer hard won and battle tested advice, tools that are actually friendly and robust and hopefully bring a smile to the frazzled sysadmin who loves this stuff anyway!

Hello, World in Different Languages

Here is Hello World in every language I have dabbled in for one reason or another. These days I stick with bash and python and the occasional compiled language.

BASIC

This was the language of my first computer, the Commodore 64!

10 PRINT "HELLO, WORLD"
20 END

Turbo Pascal

This was the first language I learned in school. Limited but kind of lovely.

program HelloWorld;
begin
  Writeln('Hello, World');
end.

For some reason Chroma refuses to format my pascal block correctly no matter what I do. So I’ve decided to accept it as an example of Wabi-sabi and move on with my life. I once wrote a Cthulhu themed text adventure in Pascal that hit all the limits for file size, number of files and memory. Fun times!

Bash

The Swiss Army knife of Unix. A one-liner here can topple servers or automate your life!

#!/bin/bash
echo "Hello, World"

Perl

The duct tape of the early web—messy and often unreadable. Perl was my first real scripting language

#!/usr/bin/perl
print "Hello, World\n";

Python

Where Perl is inscrutable, Python is elegant — I honestly thought it was pseudocode the first time I saw it. These days, it’s my primary language.

#!/usr/bin/env python3
print("Hello, World")

C

#include <stdio.h>

int main() {
    printf("Hello, World\n");
    return 0;
}

C++

The language behind just about everything for a long time.

#include <iostream>
using namespace std;

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

Java

Java powers everything from Minecraft and Spotify to Apache Hadoop to the NASDAQ to your home appliances. Not always fun to progam in but incredibly powerful and worth learning.

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

Ruby

I always joked that Ruby was a language for art majors. Elegantly difficult to follow.

#!/usr/bin/env ruby
puts "Hello, World"

PHP

The language that built half the internet. This was the language for cgi for a very long time. I never loved it but I always respected it.

<?php
echo "Hello, World\n";
?>

Objective-C

The language of NeXTSTEP and Apple!

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSLog(@"Hello, World");
    }
    return 0;
}

Lisp

Such a cool language! A ton of seminal AI research was done using Lisp.

(format t "Hello, World~%")

Lua

If you ever tried modding a game, you might have run into the Lua scripting language. Perfect for powering little video game monster’s brains.

print("Hello, World")

JavaScript (Node.js)

The modern web wouldn’t exist without it. I never really liked pure Javascript but Node.js is amazing.

console.log("Hello, World");

x86 Assembly (NASM, Linux)

Programming in assembly is like programming with DNA. It takes a lot of writing to do anything because it is as close to the hardware as you want to get.

section .data
    msg db "Hello, World", 0xA   ; The string, with newline
    len equ $ - msg

section .text
    global _start

_start:
    mov eax, 4        ; sys_write
    mov ebx, 1        ; file descriptor (stdout)
    mov ecx, msg      ; message address
    mov edx, len      ; message length
    int 0x80          ; call kernel

    mov eax, 1        ; sys_exit
    xor ebx, ebx      ; exit code 0
    int 0x80

Ada

Named after Lady Lovelace, this general-purpose, strongly typed, systems language has been used in avionics, missile guidance systems, satellites, rail control systems, even traffic lights.

with Ada.Text_IO; use Ada.Text_IO;

procedure Hello_World is
begin
   Put_Line ("Hello, World");
end Hello_World;

Smalltalk

This was a really neat language!

Transcript show: 'Hello, World'; cr.

COBOL

THE HORROR…

IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO-WORLD.
PROCEDURE DIVISION.
    DISPLAY "HELLO, WORLD".
    STOP RUN.

Fortran

It’s shocking how much Fortran code is still out there.

PROGRAM HELLO
PRINT *, 'Hello, World'
END

Conclusion

There you go! That’s hello world and welcome in 20 languages. I hope you enjoy my site!

Want to connect?

feedback@adminjitsu.com
GitHub: forfaxx

See you in the trenches.