Leetcode 9: Palindrome Number

Category : Easy


Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.

Follow up: Could you solve it without converting the integer to a string?



Example 1:

Example 2:

Example 3:

Example 4:


  • -231 <= x <= 231 - 1

Solution Approach

To check if the number is palindrome or not we just reverse the number by taking out the last digit from the number one by one and concatenating those digits to a new reverse number. In the end, we will compare those two numbers (original and the concatenated reverse number) and if they are equal then we can say that the number is palindrome otherwise they are not.

Solution code

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2 thoughts on “Leetcode 9: Palindrome Number”

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