.. index:: single: fast_random .. _fast_random/0:

.. rst-class:: right

object

fast_random

Portable random number generator predicates. Core predicates originally written by Richard O'Keefe. Based on algorithm AS 183 from Applied Statistics.

| Availability: | logtalk_load(random(loader))

| Author: Paulo Moura | Version: 3:0:0 | Date: 2026-01-25

| Compilation flags: | static, context_switching_calls

| Extends: | public :ref:`fast_random(as183) <fast_random/1>`

| Remarks:

• Single random number generator: This object provides a faster version of the random library object but does not support being extended to define multiple random number generators.
• Randomness: Loading this object always initializes the random generator seed to the same value, thus providing a pseudo random number generator. The randomize/1 predicate can be used to initialize the seed with a random value.

| Inherited public predicates: | Â :ref:`sampling_protocol/0::bernoulli/2` Â :ref:`sampling_protocol/0::beta/3` Â :ref:`random_protocol/0::between/3` Â :ref:`sampling_protocol/0::binomial/3` Â :ref:`sampling_protocol/0::chi_squared/2` Â :ref:`sampling_protocol/0::circular_uniform_cartesian/3` Â :ref:`sampling_protocol/0::circular_uniform_polar/3` Â :ref:`sampling_protocol/0::dirichlet/2` Â :ref:`random_protocol/0::enumerate/2` Â :ref:`sampling_protocol/0::exponential/2` Â :ref:`sampling_protocol/0::fisher/3` Â :ref:`sampling_protocol/0::gamma/3` Â :ref:`sampling_protocol/0::geometric/2` Â :ref:`pseudo_random_protocol/0::get_seed/1` Â :ref:`sampling_protocol/0::gumbel/3` Â :ref:`sampling_protocol/0::hypergeometric/4` Â :ref:`sampling_protocol/0::logistic/3` Â :ref:`sampling_protocol/0::lognormal/3` Â :ref:`sampling_protocol/0::logseries/2` Â :ref:`random_protocol/0::maybe/0` Â :ref:`random_protocol/0::maybe/1` Â :ref:`random_protocol/0::maybe/2` Â :ref:`random_protocol/0::maybe_call/1` Â :ref:`random_protocol/0::maybe_call/2` Â :ref:`random_protocol/0::member/2` Â :ref:`sampling_protocol/0::normal/3` Â :ref:`random_protocol/0::permutation/2` Â :ref:`sampling_protocol/0::poisson/2` Â :ref:`sampling_protocol/0::power/2` Â :ref:`random_protocol/0::random/1` Â :ref:`random_protocol/0::random/3` Â :ref:`fast_random/1::randomize/1` Â :ref:`random_protocol/0::randseq/4` Â :ref:`random_protocol/0::randset/4` Â :ref:`fast_random/1::reset_seed/0` Â :ref:`random_protocol/0::select/3` Â :ref:`random_protocol/0::select/4` Â :ref:`random_protocol/0::sequence/4` Â :ref:`random_protocol/0::set/4` Â :ref:`pseudo_random_protocol/0::set_seed/1` Â :ref:`sampling_protocol/0::standard_cauchy/3` Â :ref:`sampling_protocol/0::standard_exponential/1` Â :ref:`sampling_protocol/0::standard_gamma/2` Â :ref:`sampling_protocol/0::standard_normal/1` Â :ref:`sampling_protocol/0::standard_t/2` Â :ref:`random_protocol/0::swap/2` Â :ref:`random_protocol/0::swap_consecutive/2` Â :ref:`sampling_protocol/0::triangular/4` Â :ref:`sampling_protocol/0::uniform/1` Â :ref:`sampling_protocol/0::uniform/3` Â :ref:`sampling_protocol/0::von_mises/3` Â :ref:`sampling_protocol/0::wald/3` Â :ref:`sampling_protocol/0::weibull/3` Â

.. contents:: :local: :backlinks: top

Public predicates

(no local declarations; see entity ancestors if any)

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)

.. seealso::

:ref:`fast_random <fast_random/0>`, :ref:`random <random/0>`, :ref:`random(Algorithm) <random/1>`, :ref:`backend_random <backend_random/0>`