Program to display characters of a string in reverse order

In this program, we will take input from keyboard and display characters of a string in revers order

Asking user to enter some string

str = input('Enter any string: ')

Finding length of a string and displaying it

l = len(str)
print('Number of Characters:',l)

Creating a variable i and assigning -1 value to it

i = -1

Using while loop to display characters of a string in reverse order

while i >= -l:
    print(str[i])
    i-=1

In the first loop the value of i is -1 which display last character of a string. Inside loop a statement i-=1(-1-1) will make value of i to -2 which displays second last character and so on.

Ouput

Enter any string: Python
Number of Characters: 6
n
o
h
t
y
P

Complete Code

str = input('Enter any string: ')
l = len(str)
print('Number of Characters:',l)
i = -1
while i >= -l:
    print(str[i])
    i-=1

Code : Displaying characters in reverse order using negative index

Asking user to input any string from keyboard

str = input('Enter any string : ')

Finding length and displaying it

l = len(str)
print('Number of Characters: ',l)

Creating a variable i with value 1

i = 1

Using while loop to display characters in reverse order. In while loop, using negative index in print statement

while i <= l:
    print(str[-i])
    i+=1

Output

Enter any string : Python
Number of Characters:  6
n
o
h
t
y
P

Complete Code

str = input('Enter any string : ')
l = len(str)
print('Number of Characters: ',l)
i = 1
while i <= l:
    print(str[-i])
    i+=1