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Python Palindrome: Find if String is Palindrome or not

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A sequence of characters, either in numbers or words that could be read the same way in both forward and backward directions, is known as Palindrome. When alphabets in a Palindrome are reversed, they will be the same as the original string. For example, the word “DEED” will be read the same in both forward and backward directions. Other examples are “RADAR,” “MADAM,” “LEVEL,” “ROTATOR,” and many more. There are several Python techniques to learn whether a string is a Palindrome or not. In this article, we will go through different python program examples to find out if the given string is Python Palindrome or not.

Method: 01

This method uses the reverse string technique. Here we will compare reversed and original strings, whether they are equal (same).

def ifPalindrome(i):
    return i == i[::-1]
 
 
i = "stressed desserts"
string = ifPalindrome(i)
 
if string:
    print("Yes, it is a Palindrome.")
else:
    print("No, it is not a Palindrome.")

Output

Python Palindrome

Method: 02

Here we are using an iterative implementation, simple for loop to find out the palindromic string. A loop from start to length/2 will be run to match the letters in sequence like the First letter to last, second letter to second last, etc. This way, a mismatch could easily tell whether the string is Palindrome or not.

Learn about For Loop with multiple variables.

def ifPalindrome(str):
     
    for x in range(0, int(len(str)/2)):
        if str[x] != str[len(str)-x-1]:
            return False
    return True
 
i = "stressed desserts"
Palindrome = ifPalindrome(i)
 
if (Palindrome):
    print("YES, stressed desserts is Palindrome.")
else:
    print("NO, stressed desserts is not Palindrome.")
    
j = "CodeLeaks"
Palindrome = ifPalindrome(j)
 
if (Palindrome):
    print("YES, CodeLeaks is Palindrome.")
else:
    print("NO, CodeLeaks is not Palindrome.")

Output

Method: 03

Here we can use the built-in function reversed() to reverse the original string and then convert the string to a list for comparison with the original string. Now we can learn from the palindrome string program in python.

String = 'RACECAR'

Reverse = reversed(String)

if list(String) == list(Reverse):
    print("Yes, this string is a Palindrome.")
else:
    print("No, this string is not a Palindrome.")

Output

You can also learn how to reverse list in python.

Method: 04

This method uses the flag to check the Palindrome. Here each character is compared using for loop from the start and end. In case of character mismatches, the flag’s value is changed. This way, according to the flag’s status, Palindrome is identified.

String = input("Please Enter String:  ")
flag = 0

length = len(String)
for x in range(length):
    if(String[x] != String[length - x - 1]):
        flag = 1
        break

if(flag == 0):
   print("Yes, it is a Palindrome.")
else:
   print("No, it is not a Palindrome.")

Output

Python Palindrome

FAQs

What is the difference between Palindrome and Anagram?

Palindromes are words that are spelled the same way forwards and backwards, while anagrams are two words that are spelled the same way but have a different meaning.

What are some of the best Python palindrome tools that you know about?

Here are some of the best Python palindrome tools that you may want to check out:

1. PythonPalindrome – This tool is designed to find Python palindromes.
2. Palindromes – This website contains a wide variety of palindromes, including ones that are Word, ASCII, and Unicode.
3. Python Palindrome Compiler – This tool can help you to create Python palindromes.
4. PyPal – This is a Python library that can help you to find Python palindromes.

How would you go about finding a palindrome using words from the python programming language?

There is not a single easy answer to this question, as palindromes, words that are spelled the same both forwards and backwards, can be created in many ways using Python.

Conclusion

This article has discussed palindromes and methods to check if the string is palindrome in Python program. Hope this article helped you in learning basics of Python Palindrome.