function randomNum(num1:Number, num2:Number):Number{
   var theNumber:Number=num1+Math.floor(Math.random()*(num2+1-num1))
   return theNumber
}

quote:

how do i make a button?

1)open a flash document
2)create a circle
3)right click on the circle
4)at the bottom look for 'convert to symbol' and click it
5)click the bubble for button and press ok

how do i put it to action?

PRE)make a button
1)on the bottom of the screen there are 3 bars, one of them says actions, open it up by pressing the triangle next to it
2)leftclick on the circle if you had not done so so that the title of the action bar says 'action - button'
3)now type exactly this in the given small white box where you can type:
on(release){gotoAndPlay(2);}

translation: 'on(release)' when you let go of the button '{gotoAndPlay(2);}' go to and play frame 2
you may change the frame to whatever you want

4)click on frame 1 in timeline
5)action tab should say action - frame
6)simply say:
{stop();}
dont put anything inbetween the parenthasis
translation: '{stop();}' stop this frame from playing

//code on frame 1
var exp:Number=0
var gold:Number=0
//code on frame...[insert your frame here]
gotoAndStop(1)

//code on frame 1
if(exp==undefinded){
  var exp:Number=0
}
if(gold==undefinded){
  var gold:Number=0
}

var gold:Number="a lot"//Flash generate an error
var test1:String="hello"
test1=123//generate an error too

var gold:Object="a lot"
gold=1000

var gold:Number=null//isn't an error

_global.gold:Number=1000//doesn't work

var gold:Number