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Recursive Tracing

Language/Type: Java mod recursion recursive tracing
Author: Stuart Reges (on 2014/02/13)

Consider the following method: 

    public void mystery(int x) {
        if (x < 10)
            System.out.print(x);
        else {
            int y = x % 10;
            System.out.print(y);
            mystery(x / 10);
            System.out.print(y);
        }
    }

For each call below, indicate what output is produced:

mystery(7);
mystery(38);
mystery(194);
mystery(782);
mystery(3842);

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