Java program to add two binary numbers

In this Java Program, we perform addition of two binary numbers.

Binary number  system consists of 0's and 1's hence a binary number is made up of only 0 and 1.

                                             Adding Numbers 11100 & 10101

                                                                       1                               11                                 1

    11100                        11100                    11100                         11100                           11100       

+  10101         👉       +  10101       👉      +  10101          👉       +  10101           👉        +  10101              

------------                    -------------                -------------                    -------------                   -------------

            1                              01                          001                          0001                          110001

Step 1 : Import java.util.Scanner Class

Step 2 : Create two variables b1 and b2 to hold the two binary numbers entered by the user.

Step 3 : Initialize int i = 0 and carry = 0.

Step 4 : Create an array int[] sum to hold the output binary number

Step 5 : By using the Scanner, take the two binary numbers from the user and store it in b1 and b2.

Step 6 : Close the Scanner to avoid the memory leak.

Step 7 : Add the two binary numbers bit by bit storing the result into the array.

Step 8 : Display the result by using System.out.println method.

Program :

import java.util.Scanner;

public class AddTwoBinaryNumbers

    {

        public static void main (String[] args)

        {

            //Two variables to hold two input binary numbers

            long b1, b2;

            int i = 0, carry = 0;

            //This is to hold the output binary number

            int[] sum = new int[10];

            //To read the input binary numbers entered by the user

            Scanner scanner = new Scanner(System.in);

            //getting first binary number from user

            System.out.print("Enter first binary number:");

            b1 = scanner.nextLong();

            //getting second binary number from the user

            System.out.print("Enter second binary number:");

            b2 = scanner.nextLong();

            //closing scanner after use to avoid memory leak

            scanner.close();

            while (b1 != 0 || b2!=0)

               {

                sum[i++] = (int)((b1 % 10 + b2 % 10 + carry) % 2);

                carry = (int)((b1 % 10 + b2 % 10 + carry)/2);

                b1 = b1 / 10;

                b2 = b2 / 10;

                }

            if (carry !=0)

                {

                    sum[i++] = carry;

                }

            --i;

            System.out.print("Output:");

            while (i >=0)

                {

                    System.out.print(sum[i--]);

                }

            System.out.print("\n");

                }

            }

Output:

Enter first binary number: 11100

Enter second binary number: 10101

Output: 110001

For the execution of the same do visit my YouTube channel:

https://youtu.be/RNfVTsCfNrU