Printing results of function outside of the local scope

Question

I was wondering how to print the return value of my function outside of the scope of the function. I researched online and found the post below bu this just gave me arr is undefined. Can somebody please point me in the right direction? Console log not printing variable from function

function multiplyAll(arr) {
    var product = 1;
    for (var i = 0; i < arr.length; i++) {
        for (var j = 0; j < arr[i].length; j++)
            product = product * arr[i][j];
    }
    //why is the product undefined?
    return product;
}
//modify values below to test code
multiplyAll([
    [60, 60],
    [24, 365]
]);

//console.log("Print results of product" + product);

Answer 1

Instead of just calling multiplyAll by itself, you should assign it to a variable like this:

var product = multiplyAll([[60,60],[24,365]]);

Another thing you can do if you only want to print out the result is to just put the function call inside of your console.log call like so:

console.log("Print results of product" + multiplyAll([[60,60],[24,365]]));