What is the purpose of the map() method in JavaScript?

The purpose of the map() method is simple: It creates a new array by transforming every element of an existing array. It does NOT change the original array. It returns a brand new array. Very Simple Real-life Example 🍎 Imagine you have a basket of fruits: ["apple", "banana", "mango"] Now you want to convert all fruits into uppercase: ["APPLE", "BANANA", "MANGO"] Instead of changing the original basket, you create a new basket with updated fruits. That is exactly what map() does. Basic Example const numbers = [ 1 , 2 , 3 , 4 ]; const doubled = numbers . map ( num => num * 2 ); console . log ( doubled ); // [2, 4, 6, 8] Here: Original array → [1, 2, 3, 4] New array → [2, 4, 6, 8] The original array stays the same. When Should We Use map()? When we want to modify data When we want a new array When we want cleaner and shorter code Important Difference map() → returns a new array forEach() → does not return anything One-line Summary map() is used to transform each item in an array and retur