Python Program to Check Whether a String is Palindrome or Not

A palindrome is a string which is same read forward or backwards. For example: “dad” is the same in forward or reverse direction. Another example is “aibohphobia” which literally means, an irritable fear of palindromes.

Source Code:

# Program to check if a string
#  is palindrome or not

# take input from the user
my_str = input("Enter a string: ")

# make it suitable for caseless comparison
my_str = my_str.casefold()

# reverse the string
rev_str = reversed(my_str)

# check if the string is equal to its reverse
if list(my_str) == list(rev_str):
   print("It is palindrome")
else:
   print("It is not palindrome")

Output 2:

Enter a string: aIbohPhoBiA
It is palindrome

Output 2:

Enter a string: palindrome
It is not palindrome

In this program, we have take a string from the user. Using the method casefold() we make it suitable for caseless comparisons. Basically, this method returns a lowercased version of the string. We reverse the string using the built-in function reversed(). Since this function returns a reversed object, we use the list() function to convert them into a list before comparing.