Python Program For Checking Palindrome (With Code)

In this tutorial, you will learn about the Python program for checking palindrome.

In this article, we will explore how to write a Python program for checking palindromes.

A palindrome is a word, phrase, number, or sequence of characters that reads the same forward and backward.

Writing a program to check whether a given input is a palindrome or not can be a fun and interesting coding exercise.

We will provide you with a step-by-step guide, along with example code, to help you understand the concept better.

So, let’s dive right in!

Before we proceed with the Python program, let’s first understand what a palindrome is.

A palindrome is a word, phrase, number, or sequence of characters that remains the same even when read backward.

For example, the word “level” and the number “121” are palindromes.

However, the word “hello” and the number “123” are not palindromes.

Now, let’s write a Python program to check whether a given input is a palindrome or not.

We will use a simple approach that involves comparing the input string with its reversed version.

If the two strings are the same, the input is a palindrome; otherwise, it is not.

Here is the Python code for checking palindromes.

Python Program for Checking Palindrome

def is_palindrome(input_string):
    # Convert the input string to lowercase and remove spaces
    input_string = input_string.lower().replace(" ", "")
    
    # Reverse the input string
    reversed_string = input_string[::-1]
    
    # Check if the input string and its reverse are the same
    if input_string == reversed_string:
        return True
    else:
        return False

# Test the function
word = "radar"
if is_palindrome(word):
    print(f"{word} is a palindrome")
else:
    print(f"{word} is not a palindrome")

You can run this code on our free Online Python Compiler.

Output

In this program, we define a function is_palindrome() that takes an input_string as a parameter.

We convert the input string to lowercase and remove any spaces using the lower() and replace() functions, respectively.

Then, we reverse the input string using the slicing technique [::-1].

Finally, we compare the original input string with its reverse and return True if they are the same, indicating that the input is a palindrome.

Otherwise, we return False.

Q: Can the program handle phrases with punctuation marks or special characters?

Yes, the program can handle phrases with punctuation marks or special characters.

It only removes spaces from the input string and ignores any other non-alphanumeric characters.

Q: Are uppercase and lowercase letters treated as the same in the program?

No, the program is case-sensitive. Uppercase and lowercase letters are considered different. For example, “Madam” and “madam” would be treated as different strings.

Q: Can the program handle numbers as input?

Yes, the program can handle numbers as input.

It treats numbers as strings and checks whether the string representation of the number is a palindrome.

Q: Is there any limit on the length of the input string?

No, there is no specific limit on the length of the input string.

The program can handle input strings of any length.

Q: Does the program work for single characters?

Yes, the program works for single characters as well.

A single character is considered a palindrome since it reads the same forward and backward.

Q: Can I modify the program to consider whitespace characters as valid palindromes?

Yes, you can modify the program to consider whitespace characters as valid palindromes.

Simply remove the line of code that removes spaces from the input string.

Q: How do you check if a Python is a palindrome?

To check if a string is a palindrome in Python, you can compare the string with its reverse.

If they are the same, the string is a palindrome.

Q: How to write a program to check the palindrome string Python?

To write a program to check a palindrome string in Python, you can use the reverse comparison method where you compare the string with its reversed version.

Q: How do you check a palindrome in Python without using a function?

To check a palindrome in Python without using a function, you can manually reverse the string using slicing and then compare it with the original string.

Q: What is ::- 1 in Python?

In Python, [::-1] is a slicing technique used to reverse a string.

It returns the string starting from the last character and stepping backwards by one character at a time.

In this article, we discussed how to write a Python program for checking palindromes.

We explained the concept of palindromes and provided a step-by-step guide along with example code.

Python Program for Checking Palindrome

The program checks whether a given input is a palindrome by comparing it with its reverse.

We also addressed some frequently asked questions to help you better understand the topic.

Now that you have a clear understanding of palindromes and how to check them in Python, you can apply this knowledge to solve similar problems or incorporate it into your own projects.