1d.. ii) Test for prime numbers.

Program:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Prac_1_d2

{

using A = System.Console;

class Program

{

static void Main(string[] args)

{

int num;

A.WriteLine("Enter the number");

num = int.Parse(A.ReadLine());

int i;

for (i = 2; i < num; i++)

{

if (num % i == 0)

{

A.WriteLine("{0} is not a prime number", num);

break;

}

}

6

if(i==num)

{

A.WriteLine("{0} is prime number", num);

}

A.ReadKey();

}

}

}