bpo-39288: Add math.nextafter(x, y) (GH-17937)
Return the next floating-point value after x towards y.
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 43eaba9..135adf8 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -213,6 +213,14 @@
of *x* and are floats.
+.. function:: nextafter(x, y)
+
+ Return the next floating-point value after *x* towards *y*.
+
+ If *x* is equal to *y*, return *y*.
+
+ .. versionadded:: 3.9
+
.. function:: perm(n, k=None)
Return the number of ways to choose *k* items from *n* items
diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
index 8cfb572..a686d64 100644
--- a/Doc/whatsnew/3.9.rst
+++ b/Doc/whatsnew/3.9.rst
@@ -177,6 +177,13 @@
:class:`~imaplib.IMAP4_stream` were applied to this change.
(Contributed by Dong-hee Na in :issue:`38615`.)
+math
+----
+
+Add :func:`math.nextafter`: return the next floating-point value after *x*
+towards *y*.
+(Contributed by Victor Stinner in :issue:`39288`.)
+
nntplib
-------