Nudge readers towards a more accurate mental model for loop else clauses (Backport...

diff --git a/Doc/tutorial/controlflow.rst b/Doc/tutorial/controlflow.rst
index 24c02eb2a97dbc49169bd50fed0f82848500437c..59b7fff196a3a61c11674869f69c0eae7ab325fe 100644 (file)
--- a/Doc/tutorial/controlflow.rst
+++ b/Doc/tutorial/controlflow.rst
@@ -159,6 +159,13 @@ following loop, which searches for prime numbers::
 (Yes, this is the correct code.  Look closely: the ``else`` clause belongs to
 the :keyword:`for` loop, **not** the :keyword:`if` statement.)
 
+When used with a loop, the ``else`` clause has more in common with the
+``else`` clause of a :keyword:`try` statement than it does that of
+:keyword:`if` statements: a :keyword:`try` statement's ``else`` clause runs
+when no exception occurs, and a loop's ``else`` clause runs when no ``break``
+occurs. For more on the :keyword:`try` statement and exceptions, see
+:ref:`tut-handling`.
+
 
 .. _tut-pass: