string result;

            if (n == 0)
                result = "1";
            else if (n == 1)
                result = "2";
            else
            {
                double numerator = 3;
                double denominator = 2;
                for (int i = 2; i < n; i++)
                {
                    double temp = numerator;
                    numerator = denominator;
                    denominator = temp;
                    numerator += denominator;
                   
                }
                result = numerator + "/" + denominator + " = " + (numerator / denominator);
            }

            Console.WriteLine("Result: " + result);