BIN->DEC

using System;

namespace Loops
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter BIN: ");
            int num = int.Parse(Console.ReadLine());
            int num1 = num;
            int dec = 0;
            int power = 0;
            while (num != 0)
            {
                int digit = num % 10;
                dec += digit * (int)Math.Pow(2, power);
                power++;
                num /= 10;
            }
            Console.WriteLine($"{num1}(2) = {dec}(10)");
        }
    }
}