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Basic Types

TypeScript adds static types to JavaScript values.

Official docs

Everyday Types — typescriptlang.org

Primitive Types​

let name: string = 'DevFlow';
let count: number = 42;
let active: boolean = true;

Arrays and Objects​

let tags: string[] = ['react', 'nextjs'];
let user: { name: string; age: number } = { name: 'Ali', age: 30 };

Type Inference​

TypeScript infers types when you don't annotate:

const message = 'hello'; // inferred as string