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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/double.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/double.rst')
-rw-r--r-- | docs/source/lang/double.rst | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/docs/source/lang/double.rst b/docs/source/lang/double.rst deleted file mode 100644 index 1527778..0000000 --- a/docs/source/lang/double.rst +++ /dev/null @@ -1,48 +0,0 @@ -.. _lang-double: - -``double`` -========== - -Double precision floating point type. Occupies 8 bytes. On Maple, the -``double`` type has a range of approximately -1.79769×10^308 to -1.79769×10^308; the ``double`` type subject to the same :ref:`overflow -issues <lang-variables-rollover>` as any numeric data type. - -Floating point numbers are not exact, and may yield strange results -when compared. For example ``6.0 / 3.0`` may not equal ``2.0``. You -should instead check that the absolute value of the difference between -the numbers is less than some small number. - -Floating point math is also much slower than integer math in -performing calculations, so should be avoided if, for example, a loop -has to run at top speed for a critical timing function. Programmers -often go to some lengths to convert floating point calculations to -integer math to increase speed. - -For more information, see the `Wikipedia article on floating point -math <http://en.wikipedia.org/wiki/Floating_point>`_\ . - -Floating-point numbers represent numbers with "decimal point", unlike -integral types, which always represent whole numbers. Floating-point -numbers are often used to approximate analog and continuous values -because they have greater resolution than integers. - -The double implementation on the Maple uses twice the number of bytes -as a :ref:`float <lang-float>`, with the corresponding gains in -precision. - -Tip ---- - -Users who borrow code from other sources that includes ``double`` -variables may wish to examine the code to see if the implied range and -precision are different from that actually achieved on the Maple. - -See Also --------- - -- :ref:`float <lang-float>` - - - -.. include:: cc-attribution.txt |