recursion_mystery1

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< recursion_mystery0

recursion_mystery2 >

Main Page → Exercises → PHP → Solve an Exercise

Language/Type: PHP recursion recursion mystery

Given the function below, what is the output of the following call?

function mystery($n) {
    if ($n < 10) {
        return $n;
    } else {
        $a = intval($n / 10);
        $b = $n % 10;
        return mystery($a + $b);
    }
}

mystery(193);
81 3 54 4 648 (order shuffled)

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recursion_mystery1