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Author: 17tanya

Math/Palindrome_Number.java

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+//LeetCode 9. Palindrome Number
+//Question - https://leetcode.com/problems/palindrome-number/
+
+class Solution {
+    public boolean isPalindrome(int x) {
+        if(x < 0 || (x != 0 && x % 10 == 0)) return false;
+        
+        int rev = 0;
+        while(x > rev){
+            rev = rev * 10 + (x % 10);
+            x = x / 10;
+        }
+        
+        /*
+        Two conditions to check if the number is a palindrome - 
+        1. even length number ==> x == rev
+        2. odd length number ==> x == rev/10
+        */
+        return (x == rev || x == rev / 10);
+    }
+}