Python palindrome checker with Boolean logic

Last update on April 01 2025 13:19:06 (UTC/GMT +8 hours)

6. Palindrome Checker

Write a Python function that checks if a given string is a palindrome (reads the same backward as forward) using boolean values.

Sample Solution:

Code:

def is_palindrome(string):
    text = ''.join(char.lower() for char in string if char.isalnum())
    return text == text[::-1]

def main():
    try:
        input_string = input("Input a string: ")
        
        if is_palindrome(input_string):
            print("The string is a palindrome.")
        else:
            print("The string is not a palindrome.")
    except Exception as e:
        print("An error occurred:", e)

if __name__ == "__main__":
    main()

Output:

Input a string: mamdam
The string is not a palindrome.

Input a string: madam
The string is a palindrome.

In the exercise above the program prompts the user to input a string, and then uses the "is_palindrome()" function to determine if the string is a palindrome. The string is converted to lowercase, non-alphanumeric characters are removed, and the cleaned string is checked for consistency when read backwards. It prints the appropriate message based on the results.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to check if a string is a palindrome by comparing it to its reversed form using boolean expressions.
• Write a Python function to determine whether a sentence is a palindrome by ignoring case and non-alphanumeric characters, returning a boolean result.
• Write a Python script to filter a list of strings and print only those that are palindromic using boolean logic.
• Write a Python program to recursively verify if a string reads the same backward as forward and return True or False.

Python Code Editor :

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