Merge pull request #2224 from Ykhan799/main

Create: 0009-palindrome-number.c

Author: Ykhan799

c/0009-palindrome-number.c

@@ -0,0 +1,23 @@
+bool isPalindrome(int x){
+    if (x < 0) {
+        return false;
+    }
+    long div = 1;
+    while (x >= 10 * div) {
+        div *= 10;
+    }
+
+    while (x) {
+        int right = x % 10;
+        int left = x / div;
+
+        if (left != right) {
+            return false;
+        }
+
+        x = (x % div) / 10;
+        div /= 100;
+    }
+
+    return true;
+}