The switch statement determines if the point is at the origin (0, 0); on the red x-axis; on
the orange y-axis; inside the blue 4-by-4 box centered on the origin; or outside of the
box.
Unlike C, Swift allows multiple switch cases to consider the same value or values. In fact,
the point (0, 0) could match all four of the cases in this example. However, if multiple
matches are possible, the first matching case is always used. The point (0, 0) would
match case (0, 0) first, and so all other matching cases would be ignored.