What are negative indexes and why are they used?

Negative indexes are the indexes from the end of the list or tuple or string.

Arr[-1] means the last element of array Arr[]

arr = [1, 2, 3, 4, 5, 6]

#get the last element

print(arr[-1]) #output 6

#get the second last element

print(arr[-2]) #output 5