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Diffstat (limited to 'Doc/library/math.rst')
| -rw-r--r-- | Doc/library/math.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Doc/library/math.rst b/Doc/library/math.rst index 7aa543a..7118678 100644 --- a/Doc/library/math.rst +++ b/Doc/library/math.rst @@ -409,7 +409,7 @@ Power and logarithmic functions .. function:: pow(x, y) Return ``x`` raised to the power ``y``. Exceptional cases follow - Annex 'F' of the C99 standard as far as possible. In particular, + the IEEE 754 standard as far as possible. In particular, ``pow(1.0, x)`` and ``pow(x, 0.0)`` always return ``1.0``, even when ``x`` is a zero or a NaN. If both ``x`` and ``y`` are finite, ``x`` is negative, and ``y`` is not an integer then ``pow(x, y)`` @@ -419,6 +419,11 @@ Power and logarithmic functions its arguments to type :class:`float`. Use ``**`` or the built-in :func:`pow` function for computing exact integer powers. + .. versionchanged:: 3.11 + The special cases ``pow(0.0, -inf)`` and ``pow(-0.0, -inf)`` were + changed to return ``inf`` instead of raising :exc:`ValueError`, + for consistency with IEEE 754. + .. function:: sqrt(x) |