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[3.10] bpo-45584: Clarify math.trunc documentation (GH-29183) #32273

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Apr 2, 2022
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[3.10] bpo-45584: Clarify math.trunc documentation (GH-29183) #32273

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18 changes: 10 additions & 8 deletions Doc/library/math.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -32,8 +32,8 @@ Number-theoretic and representation functions
.. function:: ceil(x)

Return the ceiling of *x*, the smallest integer greater than or equal to *x*.
If *x* is not a float, delegates to ``x.__ceil__()``, which should return an
:class:`~numbers.Integral` value.
If *x* is not a float, delegates to :meth:`x.__ceil__ <object.__ceil__>`,
which should return an :class:`~numbers.Integral` value.


.. function:: comb(n, k)
Expand Down Expand Up @@ -77,9 +77,9 @@ Number-theoretic and representation functions

.. function:: floor(x)

Return the floor of *x*, the largest integer less than or equal to *x*.
If *x* is not a float, delegates to ``x.__floor__()``, which should return an
:class:`~numbers.Integral` value.
Return the floor of *x*, the largest integer less than or equal to *x*. If
*x* is not a float, delegates to :meth:`x.__floor__ <object.__floor__>`, which
should return an :class:`~numbers.Integral` value.


.. function:: fmod(x, y)
Expand Down Expand Up @@ -298,9 +298,11 @@ Number-theoretic and representation functions

.. function:: trunc(x)

Return the :class:`~numbers.Real` value *x* truncated to an
:class:`~numbers.Integral` (usually an integer). Delegates to
:meth:`x.__trunc__() <object.__trunc__>`.
Return *x* with the fractional part
removed, leaving the integer part. This rounds toward 0: ``trunc()`` is
equivalent to :func:`floor` for positive *x*, and equivalent to :func:`ceil`
for negative *x*. If *x* is not a float, delegates to :meth:`x.__trunc__
<object.__trunc__>`, which should return an :class:`~numbers.Integral` value.

.. function:: ulp(x)

Expand Down