How to convert binary to decimal

Question

How can I convert a binary string, such as 1001101 to Decimal? (77)

Answer 1

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I have tried this after reading your problem. It is a bit longer but it provides a solution. I saved binary elements in an array to get a solution. Like I said It is a bit longer, much shorter ways can be found.

        // Binary ------> Decimal 
        int len;
        double deci = 0;

        Console.Write("Length of binary number: ");
        len = Convert.ToInt32(Console.ReadLine());

        int[] bnry = new int[len];

        for (int i = 0; i < len; i++)
        {
            Console.Write("{0} index of binary number: ", i);
            bnry[i] = Convert.ToInt32(Console.ReadLine());
        }
        Console.Write("Your binary number: ");
        for (int i = len - 1; 0 <= i; i--)
        {

            Console.Write(bnry[i]);

        }

        Console.Write("\nDecimal number: ");
        for (int i = 0; i < len; i++)
        {
            deci += (bnry[i] * Math.Pow(2, i));
        }
        Console.Write(deci);