Binary to Decimal Java

PROGRAM TO CONVERT BINARY NUMBER TO DECIMAL NUMBER

import java.io.*;

  

class MAIN {

  

    // Function to convert binary to decimal

    static int binaryToDecimal(String n)

    {

        String num = n;

        int dec_value = 0;

  

        // Initializing base value to 1,

        // i.e 2^0

        int base = 1;

  

        int len = num.length();

        for (int i = len - 1; i >= 0; i--) {

            if (num.charAt(i) == '1')

                dec_value += base;

            base = base * 2;

        }

  

        return dec_value;

    }

  

    // Driver program to test above function

    public static void main(String[] args)

    {

        String num = new String("10101001");

        System.out.println(binaryToDecimal(num));

    }

}




OUTPUT

169

CREDITS: https://www.geeksforgeeks.org/program-binary-decimal-conversion/