Your First Look at TypeScript
Write and run your first TypeScript code.
Your First Look at TypeScript is a free TypeScript Academy lesson on CoddyKit — lesson 3 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 TypeScript Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Time to peek
Let's look at real TypeScript. Don't worry, it looks just like JavaScript with tiny extras. 😄
A simple value
Here we store a name. The ": string" is just a label saying "this holds text".
let name: string = "Alex";
console.log(name);That tiny label
That ": string" is the whole idea. It tells TypeScript what kind of value lives here.
Numbers too
Use ": number" for numbers and ": boolean" for true/false. Simple, friendly labels.
It protects you
If you put text into a number label, TypeScript gently says "wait, that's not right!" 🛡️
Labels are optional
Often TypeScript guesses the type for you. You add labels only when they help. No pressure!
Reads like English
"let name be a string" basically reads itself. Clear code, happy brain.
Same old logic
Loops, if-statements, functions: all work just like JavaScript. The labels are the only new friend.
Try it later
Soon you'll write your own labels and watch TypeScript guide you. It's genuinely fun.
You did it! 🎉
You've seen real TypeScript and understood it. That's a huge first step. Keep going, you're flying!
Quick Check
Last one! In "let name: string", what does ": string" do?
Frequently asked questions
Is the “Your First Look at TypeScript” lesson free?
Yes — the full text of “Your First Look at TypeScript” is free to read here on the web, and the TypeScript 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 TypeScript Academy course, upgrade to CoddyKit PRO.
What will I learn in “Your First Look at TypeScript”?
Write and run your first TypeScript code. You practise TypeScript 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 TypeScript Academy?
No prior experience is required. TypeScript Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “Your First Look at TypeScript” 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 TypeScript Academy lesson?
Yes. Every TypeScript 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 TypeScript?
- Why TypeScript Beats Plain JS
- Your First Look at TypeScript