Programming in Objective-C, Sixth Edition

The switch Statement

The type of if-else statement chain you encountered in the last program example—with the value of a variable successively compared against different values—is so commonly used when developing programs that a special program statement exists in the Objective-C language for performing precisely this function. The name of the statement is the switch statement, and its general format is as follows:

switch ( expression ){    case value1:        program statement        program statement          ...        break;    case value2:        program statement        program statement          ...        break;     ...    case valuen:        program statement        program statement          ...        break;    default:        program ...