How to get the last item in a list

Code

items = ["hello","world"]                   #1
lastItem = items[-1]                        #2

How this works - line by line

items = ["hello","world"]                   #1

I'm setting a list called items for demonstration purposes.
The contents of this list are two strings - "hello" and "world"

lastItem = items[-1]                        #2

[-1] of the items list selects the last item in the list.