rand num
Returns a random fractional number between 0 and the
value of num. (num should be positive.)
If num is omitted, the function returns a value between 0 and 1
(including 0, but excluding 1). See
also srand.
To get an integral value, combine this with int, as in:
$roll = int(rand 6) + 1; # $roll is now an integer between 1 and 6