JavaScript vs TypeScript Variables Explained for Beginners

How does TypeScript help catch mistakes? In this beginner-friendly lesson, we explain type annotations — how to label your variables so TypeScript can protect you from bugs.

You will learn:
✅ What a TypeScript type annotation is
✅ How to use the string type
✅ How to use the number type
✅ How to use the boolean type
✅ How TypeScript catches type errors before your code runs

This is Lesson 4 of the "For The Love Of Programming" series — a beginner programming course using JavaScript and TypeScript.

⏱ Timestamps:
0:00 Intro
0:20 JavaScript variable types
1:20 typeof and type checking
2:20 Running JavaScript examples
3:00 Console logging multiple values
3:40 Why TypeScript helps
4:20 Adding TypeScript type annotations
5:00 String, number, and boolean types
5:40 TypeScript catches type mistakes
6:20 Final TypeScript example
6:50 Recap

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