Return Values

A function can compute a value and return it to the caller.

return_values.php

<?php
function subtotal(int $price, int $quantity): int {
    $total = $price * $quantity;
    return $total;
}

$quantity = ;
$amount = subtotal(7, $quantity);

echo "quantity=" . $quantity . "\n";
echo "amount=" . $amount . "\n";

<?php
function subtotal(int $price, int $quantity): int {
    $total = $price * $quantity;
    return $total;
}

$quantity = ;
$amount = subtotal(7, $quantity);

echo "quantity=" . $quantity . "\n";
echo "amount=" . $amount . "\n";

<?php
function subtotal(int $price, int $quantity): int {
    $total = $price * $quantity;
    return $total;
}

$quantity = ;
$amount = subtotal(7, $quantity);

echo "quantity=" . $quantity . "\n";
echo "amount=" . $amount . "\n";

return `return` sends a value back to the expression that called the function.