Primitive Types in TypeScript

TypeScript supports JavaScript's primitive types: number, string, boolean, symbol, and bigint.

Overview of Primitives

`sum: ${x}`

Array & Tuple Primitives

Arrays can be typed using array syntax type[] or Array<type>.

typescript
let scores: number[] = [90, 85, 95];
let names: Array<string> = ["Alice", "Bob"];

// Tuple: fixed-length array with specified types at each position
let tuple: [string, number] = ["Alice", 25];

TL;DR

• Always use lowercase primitive type names (number, string, boolean), not upper-cased wrappers (Number, String).
• Tuples define fixed-length arrays with distinct element types at each index.