aboutsummaryrefslogtreecommitdiffstats
path: root/source/arduino/min.rst
blob: efe78ca6745f5d0960f99f511660ec440ac95485 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
.. highlight:: cpp

.. _arduino-min:

min(x, y)
=========

Description
-----------

(Macro) Calculates the minimum of two numbers.



Parameters
----------

**x**: the first number; may be any number or numeric expression.

**y**: the second number; may be any number or numeric expression.


Returns
-------

The smaller of the two numbers.


Example
-------

::

    sensVal = min(sensVal, 100); // assigns sensVal to the smaller of sensVal or 100
                                 // ensuring that it never gets above 100.


.. note:: Perhaps counter-intuitively, max() is often used to
   constrain the lower end of a variable's range, while min() is used
   to constrain the upper end of the range.


Warning
-------

Because of the way ``min()`` is implemented, avoid using other
functions inside the parentheses. It may lead to incorrect results::

    min(a++, 100);   // avoid this - yields incorrect results

    a++;            // use this instead -
    min(a, 100);    // keep other operations outside min()

Arduino Compatibility
---------------------

The Maple version of ``min()`` is compatible with Arduino.

See Also
--------

-  :ref:`max() <arduino-max>`
-  :ref:`constrain() <arduino-constrain>`


.. include:: cc-attribution.txt