Negative Indexing
Python allows negative indexing for its sequences.
The index of -1 refers to the last item, -2 to the second last item and so on.
n=(‘c’,’o’,’m’,’p’,’u’,’t’,’e’,’r’)
Positive index
|
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
c |
o |
m |
p |
u |
t |
e |
r |
|
-8 |
-7 |
-6 |
-5 |
-4 |
-3 |
-2 |
-1 |
Negative index
n=('c','o','m','p','u','t','e','r')
print(n)
print(n[-1])
print(n[-3])
print(n[-4])
print(n[-5])
print(n[-7])
Output:
(‘c’, ‘o’, ‘m’, ‘p’, ‘u’, ‘t’, ‘e’, ‘r’)
r
t
u
p
o
n=('c','a','t','a','l','y','s','t')
print(n)
print(n[-1])
print(n[-3])
print(n[-2])
print(n[-6])
print(n[-4])
Output:
(‘c’, ‘a’, ‘t’, ‘a’, ‘l’, ‘y’, ‘s’, ‘t’)
t
y
s
t
l
n=(10,20,30,40,50,60,70) print(n) print(n[-1]) print(n[-3]) print(n[-2]) print(n[-6]) print(n[-4])
Output:
(10, 20, 30, 40, 50, 60, 70)
70
50
60
20
40
