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recursion_mystery11

Language/Type: PHP recursion recursion mystery

For each of the calls to the following recursive function below, indicate what output is produced: 

function recursion_mystery11($n) {
    print("( ");
    helper($n);
    print(") ( ");
    helper($n);
    print(")");
}

function helper($n) {
    if ($n <= 1) {
        print("$n  = ");
    } else {
        print(($n % 2) . " ");
        helper(intval($n / 2));
        print("$n ");
        $n = $n - 1;
    }
}
recursion_mystery11(8);
recursion_mystery11(25);
recursion_mystery11(46);

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