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gh-130153: reword match paragraph in Doc/tutorial/controlflow.rst #129954

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merged 3 commits into from
Mar 5, 2025
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gh-130153: reword match paragraph in Doc/tutorial/controlflow.rst #129954

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b412488
doc: remove confusing statement
tshepang Feb 10, 2025
f359ba2
re-instate important explanation
tshepang Feb 15, 2025
0ac82ed
slight reformat
tshepang Feb 15, 2025
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5 changes: 3 additions & 2 deletions Doc/tutorial/controlflow.rst
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Expand Up @@ -289,7 +289,8 @@ similar to a switch statement in C, Java or JavaScript (and many
other languages), but it's more similar to pattern matching in
languages like Rust or Haskell. Only the first pattern that matches
gets executed and it can also extract components (sequence elements
or object attributes) from the value into variables.
or object attributes) from the value into variables. If no case matches,
none of the branches is executed.

The simplest form compares a subject value against one or more literals::

Expand All @@ -305,7 +306,7 @@ The simplest form compares a subject value against one or more literals::
return "Something's wrong with the internet"

Note the last block: the "variable name" ``_`` acts as a *wildcard* and
never fails to match. If no case matches, none of the branches is executed.
never fails to match.

You can combine several literals in a single pattern using ``|`` ("or")::

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