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Diffstat (limited to 'Doc/library/decimal.rst')
| -rw-r--r-- | Doc/library/decimal.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Doc/library/decimal.rst b/Doc/library/decimal.rst index 47627c0..c1bc624 100644 --- a/Doc/library/decimal.rst +++ b/Doc/library/decimal.rst @@ -30,7 +30,7 @@ -------------- -The :mod:`decimal` module provides support for fast correctly-rounded +The :mod:`decimal` module provides support for fast correctly rounded decimal floating point arithmetic. It offers several advantages over the :class:`float` datatype: @@ -1355,16 +1355,16 @@ In addition to the three supplied contexts, new contexts can be created with the With two arguments, compute ``x**y``. If ``x`` is negative then ``y`` must be integral. The result will be inexact unless ``y`` is integral and the result is finite and can be expressed exactly in 'precision' digits. - The rounding mode of the context is used. Results are always correctly-rounded + The rounding mode of the context is used. Results are always correctly rounded in the Python version. ``Decimal(0) ** Decimal(0)`` results in ``InvalidOperation``, and if ``InvalidOperation`` is not trapped, then results in ``Decimal('NaN')``. .. versionchanged:: 3.3 - The C module computes :meth:`power` in terms of the correctly-rounded + The C module computes :meth:`power` in terms of the correctly rounded :meth:`exp` and :meth:`ln` functions. The result is well-defined but - only "almost always correctly-rounded". + only "almost always correctly rounded". With three arguments, compute ``(x**y) % modulo``. For the three argument form, the following restrictions on the arguments hold: @@ -2135,7 +2135,7 @@ Q. Is the CPython implementation fast for large numbers? A. Yes. In the CPython and PyPy3 implementations, the C/CFFI versions of the decimal module integrate the high speed `libmpdec <https://www.bytereef.org/mpdecimal/doc/libmpdec/index.html>`_ library for -arbitrary precision correctly-rounded decimal floating point arithmetic [#]_. +arbitrary precision correctly rounded decimal floating point arithmetic [#]_. ``libmpdec`` uses `Karatsuba multiplication <https://en.wikipedia.org/wiki/Karatsuba_algorithm>`_ for medium-sized numbers and the `Number Theoretic Transform |