Check if a given number is Even or Odd

        public static string IsEvenOrOdd(int n)
        {
            if (n % 2 == 0)
                return "EVEN";
            else
                return "ODD";
        }
        

How it works:

For any given number, we divide the number by two and check the reminder. If the remainder is 0, then it means that the number is Even otherwise Odd.