using System;  

public class Exercise42

{  

    public static void Main()

{       int n1, n,p=1;

    int dec=0,i=1,j,d;

    Console.Write("\n\n");

    Console.Write("Convert a binary to decimal using for loop and without using array:\n");

    Console.Write("---------------------------------------------------------------------");

    Console.Write("\n\n");  

​

    Console.Write("Input a binary number :");

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

    n1=n;

    for (j=n;j>0;j=j/10)

    {  

          d = j % 10;

            if(i==1)

                  p*=1;

            else

                 p*=2;

​

       dec=dec+(d*p);

       i++;

    }

        Console.Write("\nThe Binary Number : {0}\nThe equivalent Decimal  Number : {1} \n\n",n1,dec);

  }

}