Slide 9.5: The switch statement

The switch Statement

For multiple conditional statements, it is better to use switch statement. The data type specified in expression must match that of case values.

The following example includes the tools:

 switch ( expression ) {
   case constant-expression1: 
     statement(s);
     break;
   case constant-expression2:
   case constant-expression3:
     statement(s);
     break;
        . 
        . 
        .
   default:
     statement(s);
 }

Three text boxes: Change the names of the first text box to ‘x’ (text box starting from the left), second text box to ‘y,’ and third text box to ‘z.’

Three label boxes: Change the text of “label1” to ‘+’ and the text of “label2” to ‘=’. Clear the text of “label3” and change its name to “display,” which is to show whether the answer is wrong or correct.

One picture box

Four command buttons: Now, change the text of the four command buttons to “Start,” “Next,” “OK,” and “Stop.” You may also change their names following their text respectively.

The following gives the implementation of this example. The Application.Exit statement terminates execution immediately.

 private void Stop_Click( object sender, EventArgs e ) {
    Application.Exit( );
 }