What is Ruby?
Discover the history, philosophy, and practical applications of Ruby in software development.
What is Ruby? is a free Ruby Academy lesson on CoddyKit — lesson 1 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Ruby Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Welcome to Ruby
Hey, welcome! You're about to meet Ruby, one of the friendliest programming languages out there. 👋
Tiny steps, fast wins
This is the most beginner-friendly, micro-sized track we have. One tiny step at a time, and you'll finish fast.
Meet Your AI Mentor 🤖
See the purple ✨ AI Mentor button at the bottom of every lesson? That is your personal tutor — free to try, available 24/7 on mobile and web.
Tap it whenever you are stuck and choose what you need:
- 💡 Explain Simply — turn anything confusing into plain words
- 📋 Step by Step — break a problem into clear steps
- 🗣️ Everyday Example — connect it to real life
There is also Mini Quiz, Code Example and Ask — ask it absolutely anything. You are never learning alone. 💜
Learn in Your Own Language 🌍
Prefer to learn in your native language? You can!
Tap the 🌐 translate button at the top-right of the lesson (it is in the top bar on the web too) and pick your language. Every lesson instantly appears in your own language.
Switch back any time — learn the way that feels easiest for you. 🙌
So what is Ruby?
Ruby is a programming language: a way to give a computer clear instructions in words it understands.
Like a recipe
Think of a recipe. You write the steps, and the cook follows them. With Ruby, your computer is the cook. 🍳
Made to feel natural
Ruby was designed to read almost like plain English. That makes it gentle for a brand-new coder like you.
Where Ruby shows up
Ruby powers real apps and websites. Big ones started here too, including parts of GitHub and Shopify.
Built for happy coders
Ruby's creator built it for one goal: developer happiness. The language wants you to enjoy writing it. 😊
You're already moving
That's the big picture, and you've got it! Next up: why so many developers fall in love with Ruby.
Quick Check
Let's lock it in. What is Ruby, really?
Frequently asked questions
Is the “What is Ruby?” lesson free?
Yes — the full text of “What is Ruby?” is free to read here on the web, and the Ruby Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Ruby Academy course, upgrade to CoddyKit PRO.
What will I learn in “What is Ruby?”?
Discover the history, philosophy, and practical applications of Ruby in software development. You practise Ruby Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Ruby Academy?
No prior experience is required. Ruby Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 1 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “What is Ruby?” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Ruby Academy lesson?
Yes. Every Ruby Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- What is Ruby?
- Why Developers Love Ruby
- Your First Look at Ruby Code