Flash CS4 ActionScript 3.0 Tutorial
How to Round a Number Down to a Whole Number with Flash ActionScript
With ActionScript, you can round a number up (ceiling), round a number down (floor) or round up or down depending on the fractional value. In this example we introduce two variables that are rounded down using using the floor method. For more information on rounding up and basic rounding see topics, Rounding Up and Basic Rounding.
Add a new layer called Actions
Option double-click (PC - Alt double-click) the keyframe in the Actions layer to open the ActionScript panel.
Copy/Paste the following code to the ActionScript panel.
rnd01 = Math.floor(rnd01);
trace("Using Floor, 2.35 becomes " + rnd01);
trace("Using Floor, 5.75 becomes " + rnd02);
Test your movie by pressing Cmd/Return (PC - Ctrl/Enter). The new rounded values display in the Output panel.
Dissecting the Code
The first two lines of the code establish two number variables named rnd01, and rnd02 and sets the initial value for each variable. The next line rounds the first variable down to the floor integer value, which is two. The following line does the same thing for the second variable.
The trace statements display the new rounded values in the Output panel along with some descriptive text.