Python Program to Check Whether a String is a Palindrome or Not
In this example, we will write a program to take a string input from the user and check if the given string is palindrome or not. To better understand this example, make sure you have knowledge of the following tutorials:-
A string is said to be a palindrome if the reverse of the string is same as string. For example, “madam” is a palindrome, but “program” is noa t palindrome.
Contents
Python Program to Check Whether a String is a Palindrome or Not using reversed() method
input_str = input("Enter a string: ")
final_str = ""
rev = reversed(input_str)
if list(input_str) == list(rev):
print(input_str, "is palindrome")
else:
print(input_str, "is not palindrome")
The output of the above program is:-
Enter a string: madam
madam is palindrome
madam is palindrome
Program Explanation:
The reversed() method reverses the given string and returns the reversed object which can be used as a list of items. The input string is also converted to a list and compared using a comparison operator.
Python Program to Check Whether a String is a Palindrome or Not using slice operator
string = input("Enter string:")
if string == string[::-1]:
print(string, "is a palindrome")
else:
print(string, "is not a palindrome")The output of the above program is:-
Enter a string: madam
madam is palindrome
madam is palindrome
Python Program to Check Whether a String is a Palindrome or Not using for loop
str = input("Enter string: ")
is_palindrome = True
for i in range(0, int(len(str)/2)):
if str[i] != str[len(str)-i-1]:
is_palindrome = False
if is_palindrome:
print(str, "is a palindrome")
else:
print(str, "is not a palindrome")The output of the above program is:-
Enter a string: madam
madam is palindrome
madam is palindrome
