SWI-Prolog -- set

Documentation
- Reference manual
  - Built-in Predicates
    - Misc arithmetic support predicates
- Packages

Availability:built-in

set_random(+Option)

Controls the random number generator accessible through the functions random/1 and random_float/0. Note that the library library(random) provides an alternative API to the same random primitives.

seed(+Seed)

Set the seed of the random generator for this thread. Seed is an integer or the atom random. If random, repeat the initialization procedure described with the function random/1. Here is an example:

?- set_random(seed(111)), A is random(6).
A = 5.
?- set_random(seed(111)), A is random(6).
A = 5.

state(+State)

Set the generator to a state fetched using the state property of random_property/1. Using other values may lead to undefined behaviour.^{117The
limitations of the underlying (GMP) library are unknown, which makes it
impossible to validate the State.}