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authorPerry Hung <iperry@gmail.com>2011-01-24 23:23:29 -0500
committerPerry Hung <iperry@gmail.com>2011-01-24 23:23:29 -0500
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-.. _arduino-unsignedint:
-
-unsigned int
-============
-
-Description
------------
-
-Unsigned ints (unsigned integers) are the same as ints in that they
-store a 2 byte value. Instead of storing negative numbers however
-they only store positive values, yielding a useful range of 0 to
-65,535 (2^16) - 1).
-
-
-
-The difference between unsigned ints and (signed) ints, lies in the
-way the highest bit, sometimes refered to as the "sign" bit, is
-interpreted. In the Arduino int type (which is signed), if the high
-bit is a "1", the number is interpreted as a negative number, and
-the other 15 bits are interpreted with
-`2's complement math. <http://en.wikipedia.org/wiki/2's_complement>`_
-
-
-
-Example
--------
-
-::
-
- unsigned int ledPin = 13;
-
-
-
-Syntax
-------
-
-::
-
- unsigned int var = val;
-
-
-
-
-- var - your unsigned int variable name
-- val - the value you assign to that variable
-
-
-
-Coding Tip
-----------
-
-When variables are made to exceed their maximum capacity they "roll
-over" back to their minimum capacitiy, note that this happens in
-both directions
-
-
-
-::
-
- unsigned int x
- x = 0;
- x = x - 1; // x now contains 65535 - rolls over in neg direction
- x = x + 1; // x now contains 0 - rolls over
-
-
-
-See Also
---------
-
-
-- `byte <http://arduino.cc/en/Reference/Byte>`_
-- `int <http://arduino.cc/en/Reference/Int>`_
-- `long <http://arduino.cc/en/Reference/Long>`_
-- `unsigned long <http://arduino.cc/en/Reference/UnsignedLong>`_
-- `Variable Declaration <http://arduino.cc/en/Reference/VariableDeclaration>`_
-
-