Prime number

Write a program in C# which asks the user for an integer number and answers if it is a prime number or not.

Input

7

Output

Is prime

Solution

using System;
public class PrimeNumber
{
    public static void Main(string[] args)
    {
        int x = Convert.ToInt32(Console.ReadLine());
        int divider = 2;

        while (x % divider != 0)
        { 
            divider++;
        }

        if (divider == x)
        { 
            Console.WriteLine("Is prime");
        }
        else
        { 
            Console.WriteLine("Is not prime");
        }
    }
}