19.25 | Module `Random`: pseudo-random number generator (PRNG)

    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 `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. If `bound` is 0, the result is 0.

    type state;;

> Values of this type are used to store the current state of the generator.

    val get_state : unit -> state;;

> Returns the current state of the generator. This is useful for checkpointing computations that use the PRNG.

    val set_state : state -> unit;;

> Resets the state of the generator to some previous state returned by `get_state`.