switch ... case statement. The strange thing about
switch ... case is that you must include the keyword break at the end of each case to prevent control from falling through to the next case. Fall through is a trick that allows you to let more than one case be executed. Control will fall through automatically to the next case unless you explicitly tell it not to with break. However, like the optional semicolons and curly braces, it's possible to forget break when you really should have used it. When that happens, the bug is difficult to find because the code looks correct. For that reason, the break statement should never be left off of a case, even by design.