Basic functions
Initialize the generator, using the argument as a seed. The same seed will always yield the same sequence of numbers.
Same as Random.init
but takes more data as seed.
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).
Return 30 random bits in a nonnegative integer.
- before 3.12.0
used a different algorithm (affects all the following functions)
Random.int bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0 and less than 230.
val int32 : Stdlib.Int32.t -> Stdlib.Int32.t
Random.int32 bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0.
val nativeint : Stdlib.Nativeint.t -> Stdlib.Nativeint.t
Random.nativeint bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0.
val int64 : Stdlib.Int64.t -> Stdlib.Int64.t
Random.int64 bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0.
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.
Advanced functions
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.