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The following switch statement pattern contains no
break statements. Thus, once execution begins, all
subsequent statements up to the end of the switch
statement are executed.
switch (integer-producing expression) {
case integer constant 1: statements for integer 1
case integer constant 2: statements for integer 2
...
default: default statements
}
In general, when there is no break statement to terminate
the execution of a sequence of statements, execution is said to
fall through to the next sequence of statements, where
execution continues, once again, in search of a
break statement.
The reason for the fall-through feature is that you occasionally
want to perform the same action in response to any of several
conditions. Note carefully, however, that inadvertently
forgetting a break is a common error.