What Are JavaScript Data Types?

Data Types Define The Type Of Value A Variable Can Hold.

JavaScript Has Two Main Categories: Primitive And Non-Primitive.

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 1. String – Text Values

String Represents Text And Is Written Inside Quotes.

Used To Store Names, Messages, And User Inputs.

let name = "Amit";

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 2. Number – Numeric Values

Number Includes Integers, Decimals, And Even Special Values.

Used For Math, Prices, Scores, And Much More.

let price = 99.99;

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 3. Boolean – True Or False

Number Includes Integers, Decimals, And Even Special Values.

Used For Math, Prices, Scores, And Much More.

let isLoggedIn = true;

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 4. Null And Undefined

Null Means Empty Value, Set Intentionally By Developer.

Undefined Means A Variable Was Declared But Not Assigned.

let a = null; let b;

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 5. Object And Array Types

Objects Store Key-Value Pairs, Arrays Store Ordered Lists.

These Are Called Non-Primitive Or Complex Data Types.

let user = { name: "Amit", age: 25 }; let items = [1, 2, 3];

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Summary – All JS Data Types

Primitive: 1) String 2) Number 3) Boolean 4) Null,  5) Undefined 6) Symbol 7)  BigInt.

Non-Primitive:  1) Object 2) Array 3) Function – All Built From Object.

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