Basic JavaScript - Nesting For Loops

JavaScript
1

I believe the problem is happend in line 6; however, I can’t recongnize what’s wrong here.

Can someone help with that?

My result of log of product is “NaN”. (console output : Nan Nan Nan)

Thank you in advance.

Your code so far

function multiplyAll(arr) {
  let product = 1;
  // Only change code below this line
for (let i = 0; i < arr.length; i++){
for (let j = 0; j < arr.length; j++) {
  product = product * arr[i][j];
}  
};
console.log(product);
  // Only change code above this line
  return product;
}

multiplyAll([[1, 2], [3, 4], [5, 6, 7]]);

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Challenge: Basic JavaScript - Nesting For Loops

Link to the challenge:

2

You have a tiny (and easy to miss) error in your logic.

Here you are measuring the length of the outer array, when you should be measuring the length of each inner array.

1 Like
3

Ahhhhhhh, get it!!! Clound’t see my blind.

Thank you so much.

4

This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.