Provided by: ocaml-man_4.08.1-8_all 
NAME
Stdlib.Random - no description
Module
Module Stdlib.Random
Documentation
Module Random
: (module Stdlib__random)
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 random seed chosen in a system-dependent way. If /dev/urandom is
available on the host machine, it is used to provide a highly random initial seed. Otherwise, a less
random seed is computed from system parameters (current time, process IDs).
val bits : unit -> int
Return 30 random bits in a nonnegative integer.
Before3.12.0 used a different algorithm (affects all the following functions)
val int : int -> int
Random.int bound returns a random integer between 0 (inclusive) and bound (exclusive). bound must be
greater than 0 and less than 2^30.
val int32 : Int32.t -> Int32.t
Random.int32 bound returns a random integer between 0 (inclusive) and bound (exclusive). bound must be
greater than 0.
val nativeint : Nativeint.t -> Nativeint.t
Random.nativeint bound returns a random integer between 0 (inclusive) and bound (exclusive). bound must
be greater than 0.
val int64 : Int64.t -> Int64.t
Random.int64 bound returns a random integer between 0 (inclusive) and bound (exclusive). bound must be
greater than 0.
val float : float -> float
Random.float bound returns a random floating-point number between 0 and bound (inclusive). 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.
Advanced functions
The functions from module Random.State manipulate the current state of the random generator explicitly.
This allows using one or several deterministic PRNGs, even in a multi-threaded program, without
interference from other parts of the program.
module State : sig end
val get_state : unit -> State.t
Return the current state of the generator used by the basic functions.
val set_state : State.t -> unit
Set the state of the generator used by the basic functions.