PHP Program to Swap Two Numbers
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PHP Program to Swap Two Numbers
In programming, there are two different techniques to swap any two numbers in a variable, they are
- Swap using Temporary Variable
- Swap without using Temporary Variable
Swap using Temporary Variable
In the following example, we will swap two numbers (25 and 50) using a temporary variable (temp).
Example
PHP Compiler
<?php
$num1 = 25;
$num2 = 50;
$temp = 0;
$temp = $num1;
$num1 = $num2;
$num2 = $temp;
echo "After swapping...";
echo "<br> num1 = $num1";
echo "<br> num2 = $num2";
?>
Output
After swapping...
num1 = 50
num2 = 25
Swap without using Temporary Variable
In the following example, we will swap two numbers (25 and 50) without using a temporary variable.
Example
PHP Compiler
<?php
$num1 = 25;
$num2 = 50;
$num1 = $num1 - $num2;
$num2 = $num1 + $num2;
$num1 = $num2 - $num1;
echo "After swapping...";
echo "<br> num1 = $num1";
echo "<br> num2 = $num2";
?>
Output
After swapping...
num1 = 50
num2 = 25
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