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author | Marti Bolivar <mbolivar@mit.edu> | 2010-12-03 20:18:00 -0500 |
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committer | Marti Bolivar <mbolivar@mit.edu> | 2010-12-03 20:18:00 -0500 |
commit | 5ceac644e90c929e77f05d357d1d35d45e673fac (patch) | |
tree | 18c76f6117942fa46391fbbd8bd24e2c759c4895 /docs/source/lang/int.rst | |
parent | e5b1e44a8ae8c593456f4b4734f05c9065f6f07b (diff) | |
download | librambutan-5ceac644e90c929e77f05d357d1d35d45e673fac.tar.gz librambutan-5ceac644e90c929e77f05d357d1d35d45e673fac.zip |
cleaning up previous commits.
note that addition of new files under docs/source/lang/api and
docs/source/lang/cpp which were just copies of files in
docs/source/lang/ imply that change history is lost to git.
Diffstat (limited to 'docs/source/lang/int.rst')
-rw-r--r-- | docs/source/lang/int.rst | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/docs/source/lang/int.rst b/docs/source/lang/int.rst deleted file mode 100644 index ca75f75..0000000 --- a/docs/source/lang/int.rst +++ /dev/null @@ -1,64 +0,0 @@ -.. 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 |