What Is A Palindrome?
Like every programmer does, let's google it!
😉
googles
A word, phrase, or sequence that reads the same backwards as forwards, e.g madam or nurses run.
Problem
To find if a word/number is a palindrome or not.
Sub Problems
- Get user input.
- Check if the input is an integer or string.
- Reverse the input.
- Check if the initial input is same as the reversed one.
Pseudo Code
Input = GetUserInput()
reversed_input = reverse(input)
if Input is equal to reversed_input:
print("It Is A Palindrome Number")
else:
print("it is not a palindrome number")
Let's Finally Code It!
- Get User Input
userInputw = input("Enter The Value:\n") #w for with whitespace
userInput = userInputw.replace(" ", "") #removing whitespace so we can test for phrases like nurses run.
- Reverse The Input
reversedInput = userInput[::-1]
- Check If The Initial Input is same as the reversed one.
if reversedInput == userInput:
print(f"{userInput} is equal to it's reverse {reversedInput} therefore it is a palindrome number.")
else:
print(f"{userInput} is not equal to it's reverse {reversedInput} therefore it is not a palindrome number.")
Making the Code Reusable
- To make the code reusable let's put the logic in a function.
def reverse_value(value):
reversedValue = value[::-1]
return reversedValue
def is_palindrome(value):
reversedValue = reverse_value(value)
if reversedValue == value:
return True
else:
return False
Full Code
def reverse_value(value):
reversedValue = value[::-1]
return reversedValue
def is_palindrome(value):
reversedValue = reverse_value(value)
if reversedValue == value:
return True
else:
return False
userInputw = input("Enter The Value:\n")
userInput = userInputw.replace(" ", "")
isPalindrome = is_palindrome(userInput)
if isPalindrome:
print(f"{userInputw} is equal to it's reverse {userInputw} therefore it is a palindrome.")
else:
print(f"{userInput} is not equal to it's reverse {reverse_value(userInput)} therefore it is not a palindrome.")
Key Takeaways:
- [::-1] Reverses a string.
- string.replace(" ", "") replaces all whitespaces with no whitespaces.
- Before jumping right into code, break the problem Into sub problems then do some pseudo code, then write the code. After That You can optimise it.
- Implement this if the problem is hard or you cannot exactly think what to code. or else it is a time waster for easy problems.
- Make The Code Reusable.
Run it on repl
Github: https://github.com/Dev2212/Palindrome-Finder-In-Python
HAPPY CODING!
Top comments (1)
Feedback is highly appreciated! This is my first post on dev.to hope you enjoy it and I hope you could learn something new from it.