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.. highlight:: cpp
.. _arduino-sq:
sq(a)
=====
Description
-----------
(Macro) computes the square of a number.
Parameters
----------
**a**: the number.
Returns
-------
**a** squared (**a** × **a**).
Warning
-------
Because of the way ``sq()`` is implemented, avoid using other
functions or causing side effects inside the parentheses, as it may
lead to incorrect results::
b = sq(a++); // avoid this - yields incorrect results
b = sq(a); // use this instead -
a++; // keep other operations outside sq()
Arduino Compatibility
---------------------
Maple's implementation of ``sq()`` is compatible with Arduino.
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