Question

This function is an interface to the simple
pseudo-random generator function rand provided by ANSI C.
(No guarantees can be given for its statistical properties.)

When called without arguments,
returns a pseudo-random real number
in the range [0,1).
When called with a number m,
math.random returns
a pseudo-random integer in the range [1, m].
When called with two numbers m and n,
math.random returns a pseudo-random
integer in the range [m, n].