Flash CS3 Documentation

ActionScript 2.0 Language Reference > ActionScript language elements > Statements > switch statement

switch statement

switch (expression){
caseClause: 
 [defaultClause:] 
}

Creates a branching structure for ActionScript statements. As with the if statement, the switch statement tests a condition and executes statements if the condition returns a value oftrue. All switch statements should include a default case. The default case should include a break statement that prevents a fall-through error if another case is added later. When a case falls through, it doesn't have a break statement.

Availability: ActionScript 1.0; Flash Player 4

Parameters

expression - Any expression.

Example

In the following example, if the String.fromCharCode(Key.getAscii()) parameter evaluates to A, the trace() statement that follows case "A" executes; if the parameter evaluates to a, the trace() statement that follows case "a"executes; and so on. If no case expression matches the String.fromCharCode(Key.getAscii()) parameter, the trace() statement that follows the default keyword executes.

var listenerObj:Object = new Object();
listenerObj.onKeyDown = function() { 
 switch (String.fromCharCode(Key.getAscii())) { 
 case "A" : 
 trace("you pressed A"); 
 break; 
 case "a" : 
 trace("you pressed a"); 
 break; 
 case "E" : 
 case "e" : 
 trace("you pressed E or e"); 
 break; 
 case "I" : 
 case "i" : 
 trace("you pressed I or i"); 
 break; 
 default : 
 trace("you pressed some other key"); 
 break; 
 } 
};
Key.addListener(listenerObj);

See also

=== strict equality operator

Flash CS3