Module

Question

Can someone tell me the answer in the last module of javascript the one with the arr3

Answer 1

On the upper right of the screen of that question, there should be an option for a "Hint" or "Unlock" the full answer with your XP. You should use the Unlock option if the answer is all you want.
I recommend going over the lessons again before attempting to answer that question and look at the comments too. They usually contain explanations.