Flash / Flex / ActionScript/Data Type/undefined

Convert undefined to string

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       trace(undefined); // undefined

   }
 }

}

       </source>
   
  

The undefined value represents the absence of data for variables, parameters, and return values without a specified type annotation.

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var info = new Object( );
       info.city = "Toronto";
       info.country = undefined;
       trace(info.language);  // Displays: undefined

   }
 }

}

       </source>