factorial.rk

(This is an example of a recursive factorial in Rockstar.)
(File extention is obviously made up.)
(I have put these wildcard variable names so you can come up...)
(...with your own creative names ;))
(I have just realized Rockstar has no multiline comments. Oops)

Factorial takes $NUM and $RES
If $NUM is smaller than $TWO
Give back $RES

$NNUM is $NUM minus $ONE
$NRES is $RES times $NUM
Put $NRES minus $ONE into $NRES
Give back Factorial taking $NNUM, $NRES