Module Random

module Random: sig .. end
Pseudo-random number generators (PRNG).


Pseudo-random number generators (PRNG).

Basic functions

val init : int -> unit
Initialize the generator, using the argument as a seed. The same seed will always yield the same sequence of numbers.
val full_init : int array -> unit
Same as Random.init but takes more data as seed.
val self_init : unit -> unit
Initialize the generator with a more-or-less random seed chosen in a system-dependent way.
val bits : unit -> int
Return 30 random bits in a nonnegative integer.
val int : int -> int
Random.int bound returns a random integer between 0 (inclusive) and bound (exclusive). bound must be more than 0 and less than 230.
val float : float -> float
Random.float bound returns a random floating-point number between 0 (inclusive) and bound (exclusive). If bound is negative, the result is negative or zero. If bound is 0, the result is 0.
val bool : unit -> bool
Random.bool () returns true or false with probability 0.5 each.