C#_Methods_1

class Program
    {
        public static int Factorial(int numb)
        {
            int res = 1;
            for (int i = numb; i > 1; i--)
                res *= i;
            return res;
        }

        static void Main(string[] args)
        {
            double e = 0.0001;
            //Console.Write(e);
            int m = int.Parse(Console.ReadLine());
            double sum = 1;
            int j = 2;
            int j1 = 4;

            for (int i = 1; i < m; i++)
            {
                sum +=((Math.Cos(Math.Pow(i,2)))) / Factorial(j) -
                    (Math.Cos(Math.Pow(i,2))) / Factorial(j1);
                j += 4;
                j1 += 4;
                Console.WriteLine(sum);

                if(Math.Abs(sum) < e)
                {
                    Console.Write("exit");
                }
            }
        }