Map and ForEach Difference Javascript

What is the difference between map & forEach?

Both of these are array methods are used to iterate over the elements of the array

Map Javascript	forEach
Returns a new Array	Doesn't return the new array, just iterates
We can `chain` methods on map, `arr.map().filter()`	We cannot `chain` methods on forEach
Use Case: To create a new Array	Use Case: To iterate on the element like a basic for loop


const arr = [2, 5, 3, 4, 7]

const mapResult = arr.map((element) => {
	return element + 2;
})

console.log(mapResult); // [4, 7, 5, 6, 9]


// forEach doesn't return anything
const forEachResult = arr.forEach((element) => {
	return element + 2;
})

console.log(forEachResult); // undefined


// Modifying original array using forEach
arr.forEach((element, index) => {
	arr[index] = element + 2;
})

Map Javascript