Is Prime (C#)

December 30, 2014 at 10:34 (.Net) ()

        static void Main(string[] args)
        {
            Console.Write("Enter a positive number: ");
            int num = int.Parse(Console.ReadLine());
            int divider = 2;
            int maxDivider = (int)Math.Sqrt(num);
            bool prime = true;
            
            while (prime && (divider <= maxDivider))
            {
                if (num % divider == 0)
                {
                    prime = false;
                }
                divider++;
            }

            Console.WriteLine("Prime? " + prime);
        }
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