# Nesting for Loops - Test

The test in this exercise has 3 answers? My code followed the instructions, and it resulted in getting the second answer correctly–but not the first or third one. I’d like to get on to the next item, but I’m just stuck here…even after watching the video and looking at the hint. Please, help. Thanks.

Tell us what’s happening:

``````  **Your code so far**
``````
``````
function multiplyAll(arr) {
var product = 1;
// Only change code below this line
var arr = [
[1, 2], [3, 4], [5, 6, 7]
];

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

// 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36`.

Challenge: Nesting For Loops

you are overwriting the function parameter, your function is not reusable and can give the expected output only with this exact input

As a general rule of thumb, you should never replace an input with a hard coded value. That prevents your function from working for a variety of different values for the input.

``````function addTwo(a, b) {
// It's a bad idea to assign a new value to a or b here
return a + b;
}