Simple program

Simple program #6 (Check whether a number is prime or not)

-1

Smallest prime number is 2

39

Not prime number

The program is written in C# programming language and will accept a number as input. The logic of the program is to check whether the number is prime or not.

 

Simple program

Note: If you are new to C# and Console Application. Try to code First C# Program

Note: Read articles on how to use Loops and Conditions.

Let’s find out a simple and easy way to code the program.

Practical Implementation:

using System;

namespace patternProblem.Simple_program

{

    class Simple6   //checking number prime or not

    {

        static void Main(string[] args)

        {

            Console.Write("Enter a number: ");

            int n = Convert.ToInt32(Console.ReadLine());

            int i = 0;

           

            if (n < 2)

            {

                Console.WriteLine("Smallest prime number is 2");

            }

            for (i = 2; i < n; i++)

            {

                if (n % i == 0)

                {

                    Console.WriteLine("Not Prime number");

                    break;

                }

            }

            if (n == i)

            {

                Console.WriteLine("Prime number");

            }

            Console.ReadKey();

        }

    }

}

Output:

The input number here is 3. The program will check with the number is prime or not. The output is shown below:

Enter a number: 39

Not Prime number

Press any key to continue . . .

For any query, comment us below.

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Posted By - +Manish Kumar Gautam +LIVE VIAR +ASP.NET SOLUTIONS 

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