Thursday, 12 February 2015

C# Program - to Check Perfect Number or Not

This C# Program Checks Whether the Entered Number is a Perfect Number or Not. A perfect number is a positive integer that is equal to the sum of its proper divisors.

class Program
    {
        static void Main(string[] args)
        {
            int number, sum = 0, n;
            Console.Write("enter the Number");
            number = int.Parse(Console.ReadLine());
            n = number;
            for (int i = 1; i < number; i++)
            {
                if (number % i == 0)
                {
                    sum = sum + i;
                }
            }
            if (sum == n)
            {
                Console.WriteLine("\n Entered number is a perfect number"); //6
                Console.ReadLine();
            }
            else
            {
                Console.WriteLine("\n Entered number is not a perfect number");
                Console.ReadLine();
            }
        }

    }
}


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