Returns a random number.

object Random(optional int n1, optional int n2)

If called with no arguments, returns a random double in the range 0.0 ≤ r < 1.0.

If called with one argument (n1), returns a random integer in the range 0 ≤ r < n1.

If called with two arguments (n1 and n2), returns a random integer in the range n1 ≤ r < n2.