How to navigate by negative indexing

In Python we can navigate item in list by negative index. Negative indexing in Python allows you to access elements from the end of a sequence, such as a list or tuple. In Python, indexing starts from 0 for the first element from the left, and -1 for the first element from the right.The example below will show you to How to navigate by negative indexing.

The negative will start from the end of list to the beginning list.

For example:

myCar=['Toyota', 'Mitsubishi','Volvo']

print(myCar[-1]) 

#output: 'Volvo'

index( -1) is start from the end of list while index(-2) is the second end ‘Mitsubishi’ and ‘Toyota’ is the first element in list index(-3).

** Just Reminder**: index(0) is also the first element ‘Toyota’ , so the meaning is that :

index(-3) = index(0) = ‘Toyota’

index(-2)=index(1)=’Mitsubishi’

index(-1)=index(2)=’Volvo’

if list has more element than this example, the algorithm is still the same. 

Please see another post for learn more.

freecode4learn.com

Leave a Reply