+500
 



C# Program to print sum of factorial of Odd series

Program Statement:
Write a program to display the sum of the following series i.e. sum of the factorial of odd series
1! + 3! + 5! + 7! + 9! + . . . + n!

Solution:
 static void Main(string[] args)
        {
            int i, j, f,last, sum = 0;
            Console.WriteLine("Enter Last value:");
            last = Convert.ToInt32(Console.ReadLine());
            i = 1;
            while (i <= last)
            {
                f = 1;
                j = i;
                while (j >= 1)
                {
                    f = f * j;
                    j--;
                }
                sum = sum + f;
                Console.WriteLine("factorial of " +i+"="+f);
                i = i + 2;
            }
            Console.WriteLine("sum of all factorial = " + sum);
            Console.ReadLine();
        }




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