Tell us what’s happening:
Describe your issue in detail here.
So, as far as reading and understanding the code I’m stuck. I don’t understand where they got the n - 1. Why does multiply(arr, n) == multiply(arr, n - 1) * arr[n - 1]? and why can I use that in both an addition problem and a multiplication problem? That part isn’t explained and I don’t understand where they got it from.
**Your code so far**
function sum(arr, n) {
// Only change code below this line
if(n <= 0) {
return 0;
} else {
return sum(arr, n - 1) + arr[n - 1];
}
}
// Only change code above this line
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Challenge: Replace Loops using Recursion
Link to the challenge: