diff --git a/bit_manipulation/check_even_odd.cpp b/bit_manipulation/check_even_odd.cpp
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+++ b/bit_manipulation/check_even_odd.cpp
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+/**
+ * @file
+ * @brief Implementation to [Check if a number is Even or Odd using Bitwise Operator]
+ * (https://www.log2base2.com/c-examples/bitwise/odd-or-even-program-in-c-using-bitwise-operator.html)
+ *
+ * @details
+ * Given an integer N, determine whether it is even or odd using bitwise manipulation.
+ * The least significant bit (LSB) of a binary number determines its parity:
+ * - If the LSB is 0, the number is even.
+ * - If the LSB is 1, the number is odd.
+ *
+ * This can be checked efficiently using the bitwise AND operator (&) with 1.
+ * - If (N & 1) == 0, N is even.
+ * - If (N & 1) == 1, N is odd.
+ *
+ * Worst Case Time Complexity: O(1)
+ * Space Complexity: O(1)
+ *
+ * @author [Vedant Mukhedkar](https://github.com/git5v)
+ */
+
+#include <cassert>   /// for assert
+#include <cstdint>
+#include <iostream>  /// for IO operations
+#include <string>
+
+/**
+ * @namespace bit_manipulation
+ * @brief Bit manipulation algorithms
+ */
+namespace bit_manipulation {
+/**
+ * @namespace even_odd
+ * @brief Functions for checking if a number is even or odd using bitwise operations
+ */
+namespace even_odd {
+
+/**
+ * @brief Checks if a number is even or odd using bitwise AND.
+ * @param N The number to check.
+ * @returns "Even" if N is even, "Odd" if N is odd.
+     */
+        std::string checkEvenOdd(std::int64_t N) {
+            return (N & 1) == 0 ? "Even" : "Odd";
+        }
+
+    }  // namespace even_odd
+}  // namespace bit_manipulation
+
+/**
+ * @brief Self-test implementations
+ * @returns void
+ */
+static void test() {
+    using bit_manipulation::even_odd::checkEvenOdd;
+
+    // Test Even numbers
+    assert(checkEvenOdd(0) == "Even");
+    assert(checkEvenOdd(2) == "Even");
+    assert(checkEvenOdd(100) == "Even");
+    assert(checkEvenOdd(-4) == "Even");
+    assert(checkEvenOdd(-1000) == "Even");
+
+    // Test Odd numbers
+    assert(checkEvenOdd(1) == "Odd");
+    assert(checkEvenOdd(3) == "Odd");
+    assert(checkEvenOdd(101) == "Odd");
+    assert(checkEvenOdd(-5) == "Odd");
+    assert(checkEvenOdd(-999) == "Odd");
+
+    std::cout << "All test cases successfully passed!" << std::endl;
+}
+
+/**
+ * @brief Main function
+ * @returns 0 on exit
+ */
+int main() {
+    test();  // run self-test implementations
+
+    // Example usage:
+    // std::int64_t num;
+    // std::cout << "Enter a number: ";
+    // std::cin >> num;
+    // std::cout << num << " is " << bit_manipulation::even_odd::checkEvenOdd(num) << std::endl;
+
+    return 0;
+}