The
Role of the break Statement
Now,
let's take a closer look at the mysterious break statement. As we've seen,
executing a break statement causes the program to "break" out of the
switch statement; execution continues at the next statement after the switch.
The reason that we need break has to
do with the fact that the switch statement is really a form of "computed
jump." When the controlling expression is evaluated, control jumps to the
case label matching the value of the switch expression. A case label is nothing
more than a marker indicating a position within the switch. When the last
statement in the case has been executed, control "falls through" to
the first statement in the following case; the case label for the next case is
ignored. Without break (or some other jump statement), control will flow from one
case into the next.
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