🥣 Cumulative Sum

Solving basic algorithms with plain JavaScript

I am an odd number. Take away one letter and I become even. What number am I?

Cumulative Sum Interview Question

Create a function that takes an array of numbers and returns a number that is the sum of all values in the array.

Cumulative Sum Implementation

// Solution 1
function cumSum(arr) {
    return arr.reduce((acc, cur) => acc + cur, 0);

// Solution 2
export function cumSum(arr) {
  let total = 0;
  for(let i = 0; i < arr.length; i++) {
    total += arr[i];
  return total;

console.log('sum: ', cumSum([1,3,5,7]));

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