Understanding Primitive Types in TypeScript: A Quick Guide

TypeScript provides a set of primitive types that form the foundation for building type-safe applications. Knowing these types helps you write cleaner, more predictable code.

List of Primitive Types in TypeScript

• string: Represents textual data.
  • Example: let name: string = "Alice";
• number: For all numbers, including integers and floats.
  • Example: let age: number = 30;
• boolean: Represents true or false values.
  • Example: let isActive: boolean = true;
• null: Indicates the intentional absence of any value.
  • Example: let data: null = null;
• undefined: Represents an uninitialized variable.
  • Example: let count: undefined = undefined;
• symbol: Used to create unique identifiers (ES6+ feature).
  • Example: let id: symbol = Symbol('id');
• bigint: For working with large integers beyond the safe integer limit for numbers (ES2020+ feature).
  • Example: let bigNumber: bigint = 9007199254740991n;

Why Use Primitive Types?

• They ensure type safety
• Help prevent runtime errors
• Make your code self-documenting

Example Usage

let title: string = "TypeScript";
let year: number = 2024;
let enrolled: boolean = false;

Understanding and using these primitive types is a core part of writing robust TypeScript code.