# Find XOR of all elements in an Array

• Difficulty Level : Basic
• Last Updated : 08 Mar, 2021

Given an array arr[] containing integers of size N, the task is to find the XOR of this array.
Examples:

Input: arr[] = {2, 4, 7}
Output:
Explanation:
XOR of the array = 2 ^ 4 ^ 7 = 1
Input: arr[] = { 3, 9, 12, 13, 15 }
Output:

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Approach: In order to find the XOR of all elements in the array, we simply iterate through the array and find the XOR using ‘^’ operator. Therefore, the following steps are followed to compute the answer:

1. Create a variable to store the XOR of the array as a result.
2. For each element in the array, find the XOR of the element and the result variable using ‘^’ operator.
3. Finally, the result variable stores the XOR of all elements in the array.

Below is the implementation of the above approach:

## CPP

 `// C++ program to find the XOR of``// all elements in the array` `#include ``using` `namespace` `std;` `// Function to find the XOR of``// all elements in the array``int` `xorOfArray(``int` `arr[], ``int` `n)``{``    ``// Resultant variable``    ``int` `xor_arr = 0;` `    ``// Iterating through every element in``    ``// the array``    ``for` `(``int` `i = 0; i < n; i++) {` `        ``// Find XOR with the result``        ``xor_arr = xor_arr ^ arr[i];``    ``}` `    ``// Return the XOR``    ``return` `xor_arr;``}` `// Driver Code``int` `main()``{` `    ``int` `arr[] = { 3, 9, 12, 13, 15 };``    ``int` `n = ``sizeof``(arr) / ``sizeof``(arr);` `    ``// Function call``    ``cout << xorOfArray(arr, n) << endl;` `    ``return` `0;``}`

## Java

 `// Java program to find the XOR of``// all elements in the array``class` `GFG {``    ` `    ``// Function to find the XOR of``    ``// all elements in the array``    ``static` `int` `xorOfArray(``int` `arr[], ``int` `n)``    ``{``        ``// Resultant variable``        ``int` `xor_arr = ``0``;``    ` `        ``// Iterating through every element in``        ``// the array``        ``for` `(``int` `i = ``0``; i < n; i++) {``    ` `            ``// Find XOR with the result``            ``xor_arr = xor_arr ^ arr[i];``        ``}``    ` `        ``// Return the XOR``        ``return` `xor_arr;``    ``}``    ` `    ``// Driver Code``    ``public` `static` `void` `main (String[] args)``    ``{``    ` `        ``int` `arr[] = { ``3``, ``9``, ``12``, ``13``, ``15` `};``        ``int` `n = arr.length;``    ` `        ``// Function call``        ``System.out.println(xorOfArray(arr, n));` `    ``}``}` `// This code is contributed by Yash_R`

## Python3

 `# Python3 program to find the XOR of``# all elements in the array` `# Function to find the XOR of``# all elements in the array``def` `xorOfArray(arr, n):` `    ``# Resultant variable``    ``xor_arr ``=` `0` `    ``# Iterating through every element in``    ``# the array``    ``for` `i ``in` `range``(n):` `        ``# Find XOR with the result``        ``xor_arr ``=` `xor_arr ^ arr[i]` `    ``# Return the XOR``    ``return` `xor_arr` `# Driver Code``if` `__name__ ``=``=` `'__main__'``:``    ``arr ``=` `[``3``, ``9``, ``12``, ``13``, ``15``]``    ``n ``=` `len``(arr)` `    ``# Function call``    ``print``(xorOfArray(arr, n))` `# This code is contributed by mohit kumar 29`

## C#

 `// C# program to find the XOR of``// all elements in the array``using` `System;` `class` `GFG {``    ` `    ``// Function to find the XOR of``    ``// all elements in the array``    ``static` `int` `xorOfArray(``int` `[]arr, ``int` `n)``    ``{``        ``// Resultant variable``        ``int` `xor_arr = 0;``    ` `        ``// Iterating through every element in``        ``// the array``        ``for` `(``int` `i = 0; i < n; i++) {``    ` `            ``// Find XOR with the result``            ``xor_arr = xor_arr ^ arr[i];``        ``}``    ` `        ``// Return the XOR``        ``return` `xor_arr;``    ``}``    ` `    ``// Driver Code``    ``public` `static` `void` `Main (``string``[] args)``    ``{``    ` `        ``int` `[]arr = { 3, 9, 12, 13, 15 };``        ``int` `n = arr.Length;``    ` `        ``// Function call``        ``Console.WriteLine(xorOfArray(arr, n));``    ``}``}` `// This code is contributed by AnkitRai01`

## Javascript

 ``
Output:
`4`

Time Complexity: O(N), where N is the size of the array.

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