Nesting For Loops -- Length Undefined

JavaScript
1

Tell us what’s happening:
I’m getting Cannot read property ‘length’ of undefined, but I’m not sure why.

Your code so far


function multiplyAll(arr) {
  var product = 1;
  // Only change code below this line

 for (var i=0; arr.length; i++){
   for(var j=0; j <arr[i].length; j++){
   product*=arr[j]; 
   }
 }
    


  // Only change code above this line
  return product;
}

// Modify values below to test your code
multiplyAll([[1,2],[3,4],[5,6,7]]);

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops

2 
 for (var i=0; arr.length; i++){

You did not create this for loop correctly.

3

I see that. I had been messing around with the code and must have deleted that my mistake. Fixed, but still having issues

4

What is your current code? How is it failing?