Swap Two Numbers using Bitwise XOR Operator
Another way to swap two numbers without using a temporary variable is by using the bitwise XOR (^) operator.
PHP
<?php $a = 10; $b = 20; echo "Before swapping: a = $a, b = $b\n"; // Swapping Operation $a = $a ^ $b; $b = $a ^ $b; $a = $a ^ $b; echo "After swapping: a = $a, b = $b\n"; ?> |
Output
Before swapping: a = 10, b = 20 After swapping: a = 20, b = 10
Explanation:
- The XOR operation is used to toggle the bits in the numbers.
- After the first operation,
aholds the combined bits ofaandb. - After the second operation,
bbecomes the original value ofa. - After the third operation,
abecomes the original value ofb. - This method effectively swaps the values of
aandbwithout using a temporary variable.
Swap Two Numbers Without using a Temporary Variable in PHP
Given two numbers, the task is to swap both numbers without using temporary variables in PHP. Swapping two numbers is a common programming task. Typically, a temporary variable is used to hold the value of one of the numbers during the swap. However, it is also possible to swap two numbers without using a temporary variable. In this article, we will explore a PHP program that accomplishes this using arithmetic operations.
Table of Content
- Swap Two Numbers using Arithmetic Operations
- Swap Two Numbers using Bitwise XOR Operator