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authorMarti Bolivar <mbolivar@mit.edu>2010-12-03 20:18:00 -0500
committerMarti Bolivar <mbolivar@mit.edu>2010-12-03 20:18:00 -0500
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-.. highlight:: cpp
-
-.. _lang-int:
-
-``int``
-=======
-
-The ``int`` data type represents integers. Integers are your primary
-data type for number storage, and store a 4 byte value. This yields a
-range of -2,147,483,648 to 2,147,483,647 (minimum value of -2^31 and a
-maximum value of (2^31) - 1; that's about negative 2 billion to
-positive 2 billion).
-
-An ``int`` stores a negative number with a technique called `two's
-complement math
-<http://en.wikipedia.org/wiki/Two%27s_complement#Explanation>`_\ .
-The highest bit in an ``int``, sometimes refered to as the "sign" bit,
-flags the number as a negative number. (See the linked article on
-two's complement for more information).
-
-The Maple takes care of dealing with negative numbers for you, so that
-arithmetic operations work mostly as you'd expect. There can be an
-:ref:`unexpected complication <lang-bitshift-signbit-gotcha>` in
-dealing with the :ref:`bitshift right operator (>>)
-<lang-bitshift>`, however.
-
-Here is an example of declaring an ``int`` variable named ``ledPin``,
-then giving it value 13::
-
- int ledPin = 13;
-
-The general syntax for declaring an ``int`` variable named ``var``,
-then giving it value ``val``, looks like::
-
- int var = val;
-
-.. _lang-int-overflow:
-
-Integer Overflow
-----------------
-
-When ``int`` variables leave the range specified above, they
-:ref:`roll over <lang-variables-rollover>` in the other direction.
-Here are some examples::
-
- int x;
- x = -2,147,483,648;
- x--; // x now contains 2,147,483,647; rolled over "left to right"
-
- x = 2,147,483,647;
- x++; // x now contains -2,147,483,648; rolled over "right to left"
-
-See Also
---------
-
-- :ref:`unsigned int <lang-unsignedint>`
-- :ref:`char <lang-char>`
-- :ref:`unsigned char <lang-unsignedchar>`
-- :ref:`long <lang-long>`
-- :ref:`unsigned long <lang-unsignedlong>`
-- :ref:`Integer Constants <lang-constants-integers>`
-- :ref:`Variables <lang-variables>`
-
-.. include:: cc-attribution.txt