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-.. highlight:: cpp
-
-.. _lang-random:
-
-random()
-========
-
-The ``random()`` function generates pseudo-random numbers.
-
-Library Documentation
----------------------
-
-.. FIXME [Breathe] use doxygenfunction when possible
-
-.. cpp:function:: random(long max)
-
- Same as a call to ``random(0, max)``.
-
-.. cpp:function:: random(long min, long max)
-
- Generate a pseudo-random number with given lower and upper bounds.
-
- *Parameters*
-
- - ``min`` - Lower bound on the returned value, inclusive
- - ``max`` - Upper bound on the returned value, exclusive
-
- *Returns*: A pseudo-random number in the range [min, max).
-
-Discussion
-----------
-
-If it is important for a sequence of values generated by
-:ref:`random() <lang-random>` to differ, on subsequent executions of a
-sketch, use :ref:`randomSeed() <lang-randomseed>` to initialize the
-random number generator with a fairly random input, such as
-:ref:`analogRead() <lang-analogread>` on an unconnected pin.
-
-Conversely, it can occasionally be useful to use pseudorandom
-sequences that repeat exactly. This can be accomplished by calling
-``randomSeed()`` with a fixed number, before starting the random
-sequence.
-
-Example
--------
-
-The following sketch initializes the random seed based on an :ref:`ADC
-<adc>` reading of pin 0. If this pin is unconnected, the Sketch
-should print different values to the :ref:`serial monitor
-<ide-serial-monitor>` each time it is run::
-
- long randNumber;
-
- void setup() {
- pinMode(0, INPUT_ANALOG);
- randomSeed(analogRead(0));
- }
-
- void loop() {
- randNumber = random(300);
- SerialUSB.println(randNumber);
-
- delay(50);
- }
-
-See Also
---------
-
-- :ref:`randomSeed() <lang-randomseed>`
-
-.. include:: /arduino-cc-attribution.txt