In this article we will discuss about the datatypes in javascript
JavaScript has several built-in data types, which can be broadly categorized into two main categories: primitive data types and non-primitive (or reference) data types.
Primitive Data Types: These are the basic building blocks of data manipulation in JavaScript. They are immutable (cannot be changed) and are directly operated upon.
Number: Represents both integer and floating-point numbers. Example:
let num = 10;String: Represents a sequence of characters, enclosed within single (' '), double (" "), or backticks (` `) quotes. Example:
let str = 'Hello';Boolean: Represents a logical value, either
trueorfalse. Example:let isTrue = true;Undefined: Represents a variable that has been declared but not assigned any value yet. Example:
let variable;Null: Represents an intentional absence of any value. Example:
let absent = null;Symbol: Introduced in ECMAScript 6, represents a unique and immutable value that may be used as the key of an Object property. Example:
const sym = Symbol('description');BigInt: Introduced in ECMAScript 2020, represents whole numbers larger than 253 - 1 or less than -253 + 1. Example:
const bigNum = 123n;
Non-Primitive (Reference) Data Types: These are objects that are accessed by reference and are mutable (can be changed).
Object: Represents a collection of key-value pairs. Example:
let obj = { key: 'value' };Array: Represents a collection of elements, ordered and accessible by indices. Example:
let arr = [1, 2, 3];Function: Represents a callable object. Example:
function myFunction() { /* function body */ }Date: Represents a date and time. Example:
let date = new Date();