find last element in python

1# To get the last element in a list you use -1 as position
2bikes = ['trek', 'redline', 'giant']
3bikes[-1]
4# Output:
5# 'giant'

1arr = ["cat", "dog", "rabbit"]
2last_element = arr[-1]

1Array = [1,2,3,4,50]
2#indes            -1
3Array[-1]