Javascript Datatypes

JavaScript Data Types

JavaScript provides several data types to store different kinds of values. Let’s explore each one:

1. String

A sequence of characters enclosed in quotes (“” or ”):

let name = “John Doe”;

2. Number

JavaScript numbers can be integers or floating-point values:

let age = 25;

let price = 19.99;

3. BigInt

Used for very large integers:

let bigNum = 1234567890123456789012345678901234567890n;

4. Boolean

Represents logical values: true or false.

let isAdult = true;

let hasLicense = false;

5. Undefined

A variable without an assigned value is automatically undefined.

let job;

console.log(job); // undefined

6. Null

Represents the intentional absence of any value.

let salary = null;

7. Symbol

Introduced in ES6, symbols are unique and immutable values often used for object property keys.

let id = Symbol(‘id’);

8. Object

Objects are collections of key-value pairs, like this:

let person = {

name: “John”,

age: 30,

job: “Developer”

};