javascript - How to create function that add numbers in array using "while" loop?

Question

I have an exercise to create a function (lets call it "iterateAndSum") which will sum all numbers in array and return the result. I can't use reduce (which is easier). I have to focus on using while loop.

I tried and failed miserably:

function iterateAndSum(arr) {
    while (i--) {
        e += arr[i]; 
    }
}

question from:https://stackoverflow.com/questions/65900995/how-to-create-function-that-add-numbers-in-array-using-while-loop

Answer 1

function iterateAndSum(arr) {
  let i = 0;
  let e = 0;
  while (i < arr.length) {
    e += arr[i];
    i++;
  }
  return e;
}