Understanding TypeScript Fundamentals

What is TypeScript?

TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.

Basic Types

TypeScript provides several basic types:

let isDone: boolean = false;
let decimal: number = 6;
let color: string = "blue";
let list: number[] = [1, 2, 3];

Interfaces

Interfaces define the shape of an object:

interface User {
  name: string;
  age: number;
  email?: string; // optional
}

Generics

Generics allow you to write reusable code:

function identity<T>(arg: T): T {
  return arg;
}

Conclusion

TypeScript adds powerful type checking to JavaScript, making your code more robust and maintainable.