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1. Print Numbers 1–1002. Print Even Numbers in Range3. Print Odd Numbers in Range4. Sum of Digits5. Reverse Digits of a Number6. Calculate Factorial (Loop)7. Fibonacci Series8. Palindrome Number Check9. Count Digits in a Number10. GCD of Two Numbers (Loop)11. LCM of Two Numbers (Loop)12. Print Prime Numbers in Range13. Count Prime Numbers in Range14. Check Composite Number15. Power of 2 Checker16. Print Number Pattern17. Print Star Pattern18. Armstrong Numbers in Range19. Strong Numbers in Range20. Sum of Series 1/1 + 1/2 + … + 1/N21. Print Multiplication Series22. Print Pyramid Pattern23. Print Inverted Pyramid Pattern24. Print Floyd's Triangle25. Print Pascal's Triangle

Palindrome Number Check in Python

Check whether an integer is a palindrome using digit reversal.

BeginnerLoop ProgramsExample 8 of 25
palindrome-number-check.py
1# Program to check palindrome number
2

3num = int(input("Enter an integer: "))
4

5temp = abs(num)
6rev = 0
7

8while temp > 0:
9    digit = temp % 10
10    rev = rev * 10 + digit
11    temp //= 10
12

13if num >= 0 and rev == num:
14    print(num, "is a palindrome")
15else:
16    print(num, "is not a palindrome")

Output

Enter an integer: 121
121 is a palindrome

What's going on

We reverse the digits and compare with the original number; for simplicity, we treat negative numbers as non-palindromes.

After this program

If the idea is still fuzzy, read Day 9: Loops and Iteration in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 loop programs, or see every topic on Python exercises.

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