Swap Two Numbers without Temp Variable in PHP

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Q. Write a PHP program to swap two numbers without using a temp variable

<?php
// Define two numbers
$a = 10;
$b = 20;

// Display before swapping
echo "Before swapping: a = $a, b = $b<br>";

// Swap without temp variable
$a = $a + $b;
$b = $a - $b;
$a = $a - $b;

// Display after swapping
echo "After swapping: a = $a, b = $b";
?>
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Q. Write an algorithm to swap two numbers without using a temp variable in PHP

1. Start
2. Define two numbers: a and b
3. Add a and b, store in a: a = a + b
4. Subtract new a by b, store in b: b = a - b
5. Subtract new a by new b, store in a: a = a - b
6. Print the swapped values
7. End
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