Day 90: Python Program to Find All Odd Palindrome Numbers in a Range without using Recursion

 

def is_palindrome(n):

    s = str(n)

    return s == s[::-1]

def find_odd_palindromes(start, end):

    odd_palindromes = []

    for num in range(start, end + 1):

        if num % 2 != 0 and is_palindrome(num):

            odd_palindromes.append(num)

    return odd_palindromes

start = int(input("Enter the start of the range: "))

end = int(input("Enter the end of the range: "))

result = find_odd_palindromes(start, end)

print(f"Odd palindrome numbers between {start} and {end}: {result}")

#source code --> clcoding.com 

1. Function Definition: is_palindrome(n)

def is_palindrome(n):

    s = str(n)

    return s == s[::-1]

Purpose: This function checks whether a number n is a palindrome.

Explanation:

s = str(n): Converts the number n to a string to easily reverse and compare its characters.

s[::-1]: This is a slicing operation that reverses the string s.

return s == s[::-1]: Compares the original string with the reversed string. If they are the same, the number is a palindrome (e.g., 121 is the same as 121 when reversed).

2. Function Definition: find_odd_palindromes(start, end)

def find_odd_palindromes(start, end):

    odd_palindromes = []

Purpose: This function finds all odd palindrome numbers within a given range, from start to end.

Explanation:

odd_palindromes = []: Initializes an empty list that will store the odd palindrome numbers found in the range.

3. Loop through the Range of Numbers

    for num in range(start, end + 1):

Purpose: This for loop iterates over all numbers in the range from start to end (inclusive).

Explanation:

range(start, end + 1): The range function generates numbers from start to end. end + 1 ensures that end is included in the range.

4. Check if the Number is Odd and a Palindrome

        if num % 2 != 0 and is_palindrome(num):

            odd_palindromes.append(num)

Purpose: Checks if the number num is both odd and a palindrome.

Explanation:

num % 2 != 0: This condition checks if the number num is odd. If the remainder when divided by 2 is not zero, it's odd.

is_palindrome(num): This calls the is_palindrome function to check if the number is a palindrome.

If both conditions are true, the number num is added to the list odd_palindromes.

5. Return the List of Odd Palindromes

    return odd_palindromes

Purpose: After the loop finishes, the function returns the list of odd palindrome numbers that were found.

6. Get User Input for Range

start = int(input("Enter the start of the range: "))

end = int(input("Enter the end of the range: "))

Purpose: This takes input from the user to define the range for finding odd palindromes.

Explanation:

input("Enter the start of the range: "): Prompts the user to enter the starting value of the range.

input("Enter the end of the range: "): Prompts the user to enter the ending value of the range.

Both inputs are converted to integers using int() because input() returns data as a string.

7. Find Odd Palindromes and Display the Result

result = find_odd_palindromes(start, end)

print(f"Odd palindrome numbers between {start} and {end}: {result}")

Purpose: This calls the find_odd_palindromes function and prints the result.

Explanation:

result = find_odd_palindromes(start, end): Calls the find_odd_palindromes function with the user-provided start and end values.

print(f"Odd palindrome numbers between {start} and {end}: {result}"): Prints the result in a formatted string showing the list of odd palindromes found in the range.