Flash / Flex / ActionScript/Data Type/Number parse

Adding strings and numbers: the compiler will convert the numbers to strings rather than the other way around.

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
     var a:Number = 2 + "2";
     trace(a); // Displays: 22
   }
 }

}

       </source>
   
  

Converting a string containing only numerical data

   <source lang="java">

package{

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

        var shoeSize:String = "12";
        var iq:Number = Number(shoeSize);
        trace(iq);
   }
 }

}

       </source>
   
  

Converting to a Number with Precision: parseInt() and parseFloat().

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var nOne:Number = parseInt("13.3");  // 13
       var nTwo:Number = parseFloat("13.3");  // 13.3
       var nThree:Number = parseInt("54");  // 54
       var nFour:Number = parseFloat("54");  // 54
   }
 }

}

       </source>
   
  

If you omit the second parameter, ActionScript attempts to parse the number value using the most appropriate base.

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var nOne:Number = parseInt("0101");  // returns 65
       trace(nOne);          
       var nColorValue:Number = parseInt("0xFF0000");
       trace(nColorValue);
   }
 }

}

       </source>
   
  

Parse number values from strings with bases other than 10 using the parseInt() function.

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
       var nOne:Number = parseInt("11", 10);   // 11
       var nTwo:Number = parseInt("11", 2);    // 3
       var nThree:Number = parseInt("gg", 17);   // 288

   }
 }

}

       </source>
   
  

Trying to cast any other value will result in a nasty NaN (Not a Number) value being assigned instead:

   <source lang="java">

package{

 import flash.display.Sprite;
 
 public class Main extends Sprite{
   public function Main(){
    var dialASong:Number = Number("(718)");
    trace(dialASong); // Displays: NaN
   }
 }

}

       </source>