Basic JavaScript - Nesting For Loops

JavaScript
1

Tell us what’s happening:
Hey everyone I got the solution on my own but my issue is I don’t understand the math aspect. Like product *= arr [i] [j];

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[i].length; j++) {
    // let sum = 2;
    product *= arr[i][j];
  }
}
  // Only change code above this line
  return product;
}

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

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Challenge: Basic JavaScript - Nesting For Loops

Link to the challenge:

2

Can you say a bit more about this? product *= arr[i][j] works like the *= operator you’ve seen previously.