add event leastener for keyboard event spacebar

The case Keyboard.UP will execute if I press the up arrow in my kyboard. what should I write if I want to press the spacebarr for example. should it be somehting like case SpaceBar?

function Degree(event:KeyboardEvent):void
{
switch(event.keyCode)
{
case Keyboard.UP :
rd();
break;
case Keyboard.DOWN :
ld();
break;
default :
break;
}
}