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Recursive Tracing

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

Consider the following method: 

    public void mystery(int x, int y) {
        if (x > y)
            System.out.print("*");
        else if (x == y)
            System.out.print("=" + y + "=");
        else {
            System.out.print(y + " ");
            mystery(x + 1, y - 1);
            System.out.print(" " + x);
        }
    }

For each call below, indicate what output is produced:

mystery(3, 3);
mystery(5, 1);
mystery(1, 5);
mystery(2, 7);
mystery(1, 8);

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