From 0ec9f47ce215f04a3ab046ef8ee34b7b1ee79f36 Mon Sep 17 00:00:00 2001
From: Laxmi-Verma-21 <laxmiverma200421@gmail.com>
Date: Thu, 4 Dec 2025 21:33:26 +0530
Subject: [PATCH] [FEATURE] Add palindrome number checker (#3046)

---
 math/palindrome_number.cpp | 48 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 math/palindrome_number.cpp

diff --git a/math/palindrome_number.cpp b/math/palindrome_number.cpp
new file mode 100644
index 0000000000..5d23e3dd2c
--- /dev/null
+++ b/math/palindrome_number.cpp
@@ -0,0 +1,48 @@
+/**
+ * @file
+ * @brief Check whether a number is a palindrome.
+ */
+
+#include <iostream>
+#include <cassert>
+
+/**
+ * @brief Checks if a number is a palindrome.
+ * @param n Number to check
+ * @return true if palindrome, false otherwise
+ */
+bool is_palindrome(int n) {
+    if (n < 0) {
+        return false;  // negative numbers are not palindromes
+    }
+    int original = n;
+    int reversed = 0;
+
+    while (n > 0) {
+        reversed = reversed * 10 + (n % 10);
+        n /= 10;
+    }
+
+    return original == reversed;
+}
+
+/**
+ * @brief Self-test implementations
+ */
+static void tests() {
+    assert(is_palindrome(121) == true);
+    assert(is_palindrome(123) == false);
+    assert(is_palindrome(0) == true);
+    assert(is_palindrome(7) == true);
+    assert(is_palindrome(-121) == false);
+
+    std::cout << "All tests passed!\n";
+}
+
+/**
+ * @brief Main function
+ */
+int main() {
+    tests();
+    return 0;
+}