Array Length

Arrays have a length property that tells you how many elements it holds. Because array indexes start at 0, the length will always be 1 greater than the last index.

Here's an example:

let list = [0, 1, 2, 3, 4];
list.length; // 5

An empty list has a length of 0:

let emptyList = [];
emptyList.length; // 0

Tests

Create two variables, shorterList and longerList. shorterList should have a length that is 3 less than the length of longerList.