How to find Prime number within Range from 1 to nth in c#

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In this Program, you can see how to find Prime number in c#  using for loop

using System;

using System.Collections.Generic;

using System.Text;



namespace testconsole

{

 class Program

 {

  static void Main(string[] args)

  {

   bool isprimenumber = true;

   Console.WriteLine("Enter nth number");

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

   for (int i = 2; i <= totalnumber; i++)

   {

    for (int j = 2; j < totalnumber; j++)

    {

     if (i != j && i % j == 0)

     {

      isprimenumber = false;

      break;

     }

    }

    if (isprimenumber)

    {

     Console.WriteLine(+i);

    }

    isprimenumber = true;

   }



   Console.ReadLine();





  }

 }

}




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