PHP Exercises : Swap two variables
PHP : Exercise-31 with Solution
Write a PHP program to swap two variables.
PHP: Swapping two variables
Swapping two variables refers to mutually exchanging the values of the variables. Generally, this is done with the data in memory.
The simplest method to swap two variables is to use a third temporary variable :
define swap(a, b) temp := a a := b b := temp
Sample Solution: -
Code : Swap two numbers using a third variable
<?php $a = 15; $b = 27; // Swap Logic echo "\nThe number before swapping is:\n"; echo "Number a =".$a." and b=".$b; $temp = $a; $a = $b; $b = $temp; echo "\nThe number after swapping is: \n"; echo "Number a =".$a." and b=".$b."\n"; ?>
Code: Swap two variables value without using third variable
<?php $a = 15; $b = 276; echo "\nBefore swapping: ". $a . ',' . $b; list($a, $b) = array($b, $a); echo "\nAfter swapping: ". $a . ',' . $b."\n"; ?>
The number before swapping is: Number a =15 and b=27 The number after swapping is: Number a =27 and b=15
PHP Code Editor:
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