Switch Statement

The switch statement causes control to be transferred to one of several statements depending on the value of an expression. It has the form

switch ( expression ) statement

The statement is typically compound. Any statement within the statement may be labelled with one or more case prefixes as follows:

case constant : statement

There may also be prefix of the form:

default : statement

When the switch statement is executed, its expression is evaluated and compared with each case constant. If one of the case constants is equal to the value of the expression, control is passed to the statement following the matched case prefix. If no case constant matches the expression, and there is a default prefix, control passes to the prefixed statement. If no case matches and if there is no default then none of the statements in the switch is executed.