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recursion_mystery9

Language/Type: PHP recursion recursion mystery

For each call to the following recursive function, write the output that is produced as it would appear on the console. 

function recursion_mystery9($x, $y) {
    if ($x < 0) {
        return -recursion_mystery9(-$x, $y);
    } elseif ($y < 0) {
        return -recursion_mystery9($x, -$y);
    } elseif ($x == 0 && $y == 0) {
        return 0;
    } else {
        $x2 = intval($x / 10);
        $y2 = intval($y / 10);
        return 100 * recursion_mystery9($x2, $y2) + 10 * ($x % 10) + $y % 10;
    }
}
recursion_mystery9(12, 49);
recursion_mystery9(73, -8);
recursion_mystery9(-248, -3795);

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