using System;

​

public class Program

{

    //Q13. Write a C# program to check if a number input by the user is prime or not

    //Test Data :

    //Enter a number : 7

    //Expected Output : 7 is prime

    public static void Main()

    {

        int[] primeArray=new int[30];

        int index=0;

        for (int j = 1; j <= 100; j++)

        {

            int count = 0;

            int n = j;

            for (int i = 1; i <= n; i++)

            {

                if (n % i == 0)

                {

                    count++;

                }

            }

​

            if (count == 2)

            {

                //Console.WriteLine(n + " is prime");

                primeArray[index]=n;

                index++;

            }

        }

        for(int i=0;i< index; i++)

        {

            Console.WriteLine(primeArray[i]);

        }

    }

}