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Hello everyone, pretty excited and gratefull for all of the job done by you guys, really enjoying it!!!

Don´t know where my questions goes/comes to/from, but I cannot understand why is that multiply(arr, n) == multiply(arr, n - 1) * arr[n - 1].:

function multiply(arr, n) {
let product = 1;
for (let i = 0; i < n; i++) {
product *= arr[i];
}
return product;
}

And says: " notice that multiply(arr, n) == multiply(arr, n - 1) * arr[n - 1]. That means you can rewrite multiply in terms of itself and never need to use a loop."—>Where do you get this??? could someone please explain???

Ty so much for the time u take to answer

Your code so far

function sum(arr, n) {
// Only change code below this line
// Only change code above this line
}

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Challenge: Basic JavaScript - Replace Loops using Recursion

I believe your question is somewhat vague.
I’m going to guess that your real question is: where is multiply calling itself in the code?
It is calling itself in the -re-written- code that you did not quote above.
Here it is from the exercise

function multiply(arr, n) {
if (n <= 0) {
return 1;
} else {
return multiply(arr, n - 1) * arr[n - 1];
}
}

ps. if I guessed your question’s meaning incorrectly, please rephrase it so we can answer it better.