JavaScript Data Types Documentation

1. Introduction

Welcome to the documentation for JavaScript Data Types. This section provides an overview of Data Types and their functionality.

2. String

A sequence of characters used to represent text. Enclosed in single or double quotes.

const greeting: string = 'Hello, World!';

3. Number

Represents numeric values, including integers and floating-point numbers.

const age: number = 25;

4. Boolean

Represents a logical value - either true or false.

const isTrue: boolean = true;

5. Undefined

Indicates that a variable has been declared but has not been assigned a value.

let undefinedVar: undefined;

6. Null

Represents the intentional absence of any object value.

const nullVar: null = null;

7. Object

Represents a collection of key-value pairs. Can include properties and methods.

const person: { name: string, age: number } = { name: 'John', age: 30 };

8. Array

An ordered list of values, where each value is identified by an index or a key.

const numbers: number[] = [1, 2, 3, 4, 5];