XOR of two Binary Strings

Last Updated : 30 Apr, 2021

Given two binary strings A and B of equal lengths, the task is to print a string which is the XOR of Binary Strings A and B.
Examples:

Input: A = “0001”, B = “0010”
Output: 0011
Input: A = “1010”, B = “0101”
Output: 1111

Approach: The idea is to iterate over both the string character by character and if the character mismatched then add “1” as the character in the answer string otherwise add “0” to the answer string to generate the XOR string.

Below is the implementation of the above approach:

C++

// C++ Implementation to find the
// XOR of the two Binary Strings
#include<bits/stdc++.h>
using namespace std;
 
// Function to find the
// XOR of the two Binary Strings
string xoring(string a, string b, int n){
string ans = "";
     
    // Loop to iterate over the
    // Binary Strings
    for (int i = 0; i < n; i++)
    {
        // If the Character matches
        if (a[i] == b[i])
            ans += "0";
        else
            ans += "1";
    }
    return ans;
}
 
// Driver Code
int main()
{
    string a = "1010";
    string b = "1101";
    int n = a.length();
    string c = xoring(a, b, n);
    cout << c << endl;
}
 
// This code is contributed by Surendra_Gangwar

Java

// Java Implementation to find the
// XOR of the two Binary Strings
import java.io.*;
 
class GFG {
    // Function to find the
    // XOR of the two Binary Strings
    static String  xoring(String a, String b, int n){
    String ans = "";
         
        // Loop to iterate over the
        // Binary Strings
        for (int i = 0; i < n; i++)
        {
            // If the Character matches
            if (a.charAt(i) == b.charAt(i))
                ans += "0";
            else
                ans += "1";
        }
        return ans;
    }
     
    // Driver Code
    public static void main (String[] args)
    {
        String a = "1010";
        String b = "1101";
        int n = a.length();
        String c = xoring(a, b, n);
        System.out.println(c);
    }
}
 
// This code is contributed by shubhamsingh10

Python3

# Python Implementation to find the
# XOR of the two Binary Strings
 
# Function to find the
# XOR of the two Binary Strings
def xor(a, b, n):
    ans = ""
     
    # Loop to iterate over the
    # Binary Strings
    for i in range(n):
         
        # If the Character matches
        if (a[i] == b[i]):
            ans += "0"
        else:
            ans += "1"
    return ans
 
# Driver Code
if __name__ == "__main__":
    a = "1010"
    b = "1101"
    n = len(a)
    c = xor(a, b, n)
    print(c)

C#

// C# Implementation to find the
// XOR of the two Binary Strings
using System;
 
class GFG{
    // Function to find the
    // XOR of the two Binary Strings
    static string xoring(string a, string b, int n){
    string ans = "";
         
        // Loop to iterate over the
        // Binary Strings
        for (int i = 0; i < n; i++)
        {
            // If the Character matches
            if (a[i] == b[i])
                ans += "0";
            else
                ans += "1";
        }
        return ans;
    }
     
    // Driver Code
    static public void Main ()
    {
        string a = "1010";
        string b = "1101";
        int n = a.Length;
        string c = xoring(a, b, n);
        Console.WriteLine(c);
    }
}
 
// This code is contributed by shubhamsingh10

Javascript

<script>
 
// Javascript Implementation to find the
// XOR of the two Binary Strings
 
// Function to find the
// XOR of the two Binary Strings
function xoring(a, b, n){
let ans = "";
     
    // Loop to iterate over the
    // Binary Strings
    for (let i = 0; i < n; i++)
    {
        // If the Character matches
        if (a[i] == b[i])
            ans += "0";
        else
            ans += "1";
    }
    return ans;
}
 
// Driver Code
    let a = "1010";
    let b = "1101";
    let n = a.length;
    let c = xoring(a, b, n);
    document.write(c);
 
</script>

Output:

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