Convert calculation result to String and set to Label
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
creationComplete="doSomething()">
<mx:Script>
public var m:Number;
public var n:Number;
public function doSomething():void {
n = 42;
m = 40;
label1.text = String(n > m);
}
</mx:Script>
<mx:Label id="label1" />
</mx:Application>