we will give you demo and example for implement.In this post, we will learn about what does reduce mean in math with an example. In this article, we will learn about how sum of array elements can be calculated using the standard old way of for loop and then by the new optimized, efficient and convenient way of reducing () method along with its syntax and examples. Improve this sample solution and post your code through Disqus Previous: Write a JavaScript program to find the sum of squares of a numeric vector. 2 : Add 100 at index 'a' and subtract 100 from index 'b+1'. See the Pen avaScript - sum and product of an array of integers- array-ex- 12 by w3resource (@w3resource) on CodePen. // sums to 1015 on javaScript Sum Array Object Values – Examples, javaScript Difference Between Two Dates in Years Months Days, JavaScript Array: Remove Element from Array. We can calculate the sum of the array elements by using the standard for loop.