Console.WriteLine("nested if");
            int c = 10;
            int d = 8;
            if (c > 9)
                if(d > 9)
            {
                Console.WriteLine("result 1");
            }
            else
            {
                Console.WriteLine("result 2");
            }

            if (c > 9)

                {
                if(d > 9)
                    Console.WriteLine("result 1");
                }
                else
                {
                    Console.WriteLine("result 2"); //why don't two 'result 2's appear ?
                }