Loops_13_BinaryToDecimal

static void Main()
        {
            string binNumber = Console.ReadLine();
            long decNumber = 0;
            int power = 1;

            for (int i = binNumber.Length -1; i >= 0; i--)
            {
                int num = binNumber[i] - 48;
                decNumber += num * power;
                power *= 2;
            }
            Console.WriteLine(decNumber);
        }