Question
Should I use .push or [] notation to add an element to the end of my array?
Answer
It is advisable to use .push because with [] notation the size of your array might change later and you might be adding a value to an already occupied index. .push guarantees that you’ll be adding to the end of your array. An alternative if you want to use [] notation would be to use .length with [] notation like so:
javascript let a = [1, 2]; a[a.length] = 3;