Simple Array Sum Solution in Javascript

by Travis Scott Lee

Problem

Given an array of integers, find the sum of its elements.

For example, if the array ar = [1,2,3], 1 + 2 + 3 = 6, so return 6.

Function Description

Complete the simpleArraySum function in the editor below. It must return the sum of the array elements as an integer.

simpleArraySum has the following parameter(s):

• ar: an array of integers

Input Format

The first line contains an integer, n, denoting the size of the array.
The second line contains nspace-separated integers representing the array’s elements.

Constraints

0 < n, ar[i] ≤ 100

Solution

First, we create a const called reducer which will serve as a function in reducing the array. Then, we set the sum equal to the arr with the reduce function along with the reducer callback. Finally, we return the sum.