Find XOR of all elements in an Array

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:

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[0]);`   `    ``// Function call` `    ``cout << xorOfArray(arr, n) << endl;`   `    ``return` `0;` `}`

C

 `// C program to find the XOR of` `// all elements in the array` `#include `   `// 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[0]);`   `    ``// Function Call` `    ``printf``(``"%d\n"``, xorOfArray(arr, n));` `    ``return` `0;` `}`   `// This code is contributed by phalashi.`

Java

 `// Java program to find the XOR of` `// all elements in the array` `import` `java.util.*;` `import` `java.io.*;` `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.
Auxiliary Space: O(1), no extra space is required, so it is a constant.

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