9

Author: OmPreetham

9-palindrome-number.js

@@ -0,0 +1,17 @@
+/**
+ * @param {number} x
+ * @return {boolean}
+ */
+var isPalindrome = function(x) {
+    if (x < 0 || (x % 10 == 0 && x != 0)) {
+        return false;
+    }
+
+    let halfNumber = 0;
+    while (x > halfNumber) {
+        halfNumber = halfNumber * 10 + (x % 10);
+        x = Math.floor(x / 10);
+    }
+
+    return x == halfNumber || x == Math.floor(halfNumber / 10);
+};