TypeScript Tuples

Introduction

Example

1/* this creates a tuple */
2let myTuple: [number, string, boolean];
3
4// This works perfectly
5myTuple = [1, "Alice", true];
6
7// myTuple = ["Alice", 1, true]; // Error: Wrong order!

Key Points

• Define a Tuple using square brackets `[type1, type2]`.
• The order of the data must match the definition exactly.
• They are commonly used in React Hooks (like `useState`).
• You cannot add extra items beyond the defined length.