Sum of Squares of Even Numbers in an Array using JavaScript Last Updated : 14 Mar, 2024 Comments Improve Suggest changes Like Article Like Report JavaScript program allows us to compute the sum of squares of even numbers within a given array. The task involves iterating through the array, identifying even numbers, squaring them, and summing up the squares. There are several approaches to find the sum of the square of even numbers in an array using Javascript which are as follows: Table of Content Iterative ApproachUsing Array MethodsIterative ApproachIn this approach, we iterate through the array and for each element, check if it's even. If it is, we calculate its square and add it to the sum. Example: The below code Find Sum of Squares of Even Numbers in an Array using the iterative approach in JavaScript. JavaScript function sumOfSquaresOfEvenNumbers(arr) { let sum = 0; for (let i = 0; i < arr.length; i++) { if (arr[i] % 2 === 0) { sum += arr[i] * arr[i]; } } return sum; } const numbers = [1, 2, 3, 4, 5, 6, 67, 8]; console.log(sumOfSquaresOfEvenNumbers(numbers)); Output120 Using Array Methods JavaScript Array methods like filter() allows us to filter out the even numbers and reduce() is used to calculate the sum of squares. Example: The below code Find Sum of Squares of Even Numbers in an Array using array methods in JavaScript. JavaScript function sumOfSquaresOfEvenNumbers(arr) { return arr.filter(num => num % 2 === 0) .reduce((acc, curr) => acc + curr * curr, 0); } const numbers = [1, 2, 3, 4, 5, 6]; console.log(sumOfSquaresOfEvenNumbers(numbers)); Output56 Comment More infoAdvertise with us Next Article Sum of Squares of Even Numbers in an Array using JavaScript A anjugaeu01 Follow Improve Article Tags : JavaScript Web Technologies Similar Reads Sum of Squares of Odd Numbers in an Array in JavaScript The task involves iterating through the array, identifying odd numbers, squaring them, and summing up the squares. The different approaches to accomplish this task are listed below.Table of ContentIterative ApproachUsing Array MethodsUsing map and reduce MethodsIterative ApproachIn this approach, we 3 min read How to get the standard deviation of an array of numbers using JavaScript ? Given an array and the task is to calculate the standard deviation using JavaScript. 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