<?php
// Name:
// Aim:
// Date:
// En.No:
// PC No:

$globalVariable = 10;

function AirthOperation($localVariable) {
    global $globalVariable;

    $sum = $localVariable + $globalVariable;
    $subtraction = $localVariable - $globalVariable;
    $division = $localVariable / $globalVariable;
    $modulus = $localVariable % $globalVariable;
    $multiplication = $localVariable * $globalVariable;

    echo "Sum: $sum<br>";
    echo "Subtraction: $subtraction<br>";
    echo "Division: $division<br>";
    echo "Modulus: $modulus<br>";
    echo "Multiplication: $multiplication<br>";

    $GLOBALS['sumValue'] = $sum;
}

function IncDecOperation() {
    global $globalVariable;

    $preIncrement = ++$globalVariable;
    $preDecrement = --$globalVariable;
    $postIncrement = $globalVariable++;
    $postDecrement = $globalVariable--;

    echo "Pre-Increment: $preIncrement<br>";
    echo "Pre-Decrement: $preDecrement<br>";
    echo "Post-Increment: $postIncrement<br>";
    echo "Post-Decrement: $postDecrement<br>";
}

function stringconcat($string1, $string2) {
    $output = $string1 . ' ' . $string2;
    echo "Concatenated String: $output<br>";
}

AirthOperation(5);
IncDecOperation();
stringconcat("php", "with mysql");

echo "Sum Value using reference variable: {$GLOBALS['sumValue']}<br>";

$variable = "PHP";
echo 'Single Quotes: $variable<br>';
echo "Double Quotes: $variable<br>";
?>