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gh-94906: Support multiple steps in math.nextafter (#103881)

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This PR updates `math.nextafter` to add a new `steps` argument. The behaviour is as though `math.nextafter` had been called `steps` times in succession.

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Co-authored-by: Mark Dickinson <mdickinson@enthought.com>
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Matthias Görgens 2023-05-20 04:03:49 +08:00 • committed by GitHub
parent c3f43bfb4b
commit 6e39fa1955
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10 changed files with 223 additions and 18 deletions
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Doc/library/math.rst
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@ -224,11 +224,11 @@ Number-theoretic and representation functions
of *x* and are floats.
.. function:: nextafter(x, y)
.. function:: nextafter(x, y, steps=1)
Return the next floating-point value after *x* towards *y*.
Return the floating-point value *steps* steps after *x* towards *y*.
If *x* is equal to *y*, return *y*.
If *x* is equal to *y*, return *y*, unless *steps* is zero.
Examples:
@ -239,6 +239,9 @@ Number-theoretic and representation functions
See also :func:`math.ulp`.
.. versionchanged:: 3.12
Added the *steps* argument.
.. versionadded:: 3.9
.. function:: perm(n, k=None)