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.. highlight:: cpp
.. _lang-char:
``char``
========
The ``char`` type stores a 1-byte character value (or integer with
value from -128 to 127). Character literals are written in single
quotes, like this: ``'A'`` (for multiple characters - strings - use
double quotes: ``"ABC"``).
Just like everything else on a computer, characters are stored as
numbers. You can see the specific encoding in the `ASCII chart
<http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters>`_\
. This means that it is possible to do arithmetic on characters, in
which the ASCII value of the character is used (e.g. ``'A' + 1`` has the
decimal value 66, since the ASCII value of the capital letter A in
decimal is 65). See the :ref:`Serial.println()
<lang-serial-println>` documentation for more information about how
characters are converted into numbers.
The ``char`` datatype is a signed type, meaning that it encodes
numbers from -128 to 127. For an unsigned type, which stores values
from 0 to 255, just use the type ``unsigned char`` (two words).
Example
-------
::
// the following two lines are equivalent, using the ASCII
// character encoding:
char c = 'A';
char c = 65;
See also
--------
- :ref:`lang-int`
- :ref:`lang-array` (a string is just an array of ``char``\ s)
- :ref:`Serial.println() <lang-serial-println>`
.. include:: cc-attribution.txt
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