int? num1 = 10; int? num2 = null; if (num1 >= num2) { Console.WriteLine("num1 is greater than or equal to num2"); } else { Console.WriteLine("num1 >= num2 is false (but num1 < num2 also is false)"); } if (num1 < num2) { Console.WriteLine("num1 is less than num2"); } else { Console.WriteLine("num1 < num2 is false (but num1 >= num2 also is false)"); } if (num1 != num2) { Console.WriteLine("num1 != num2 is true!"); } num1 = null; if (num1 == num2) { Console.WriteLine("num1 == num2 is true if the value of each is null"); } // Output: // num1 >= num2 is false (but num1 < num2 also is false) // num1 < num2 is false (but num1 >= num2 also is false) // num1 != num2 is true! // num1 == num2 is true if the value of each is null