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bpo-41394: State special _ in appendix of tutorial #21651

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Update appendix.rst
wyz23x2 Jul 28, 2020
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Fixed hyper to match "tut"
wyz23x2 Jul 28, 2020
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Update appendix.rst
wyz23x2 Jul 28, 2020
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Create 2020-07-27-23-05-02.bpo-41394.BEos8A.rst
wyz23x2 Jul 28, 2020
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bpo-41394: Document '_' in interpreter tutorial
wyz23x2 Jul 28, 2020
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Update 2020-07-27-23-05-02.bpo-41394.BEos8A.rst
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bpo-41394: State special _ in appendix of tutorial
wyz23x2 Jul 28, 2020
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20 changes: 20 additions & 0 deletions Doc/tutorial/appendix.rst
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Expand Up @@ -31,6 +31,26 @@ Typing an interrupt while a command is executing raises the
:exc:`KeyboardInterrupt` exception, which may be handled by a :keyword:`try`
statement.

.. _special-var:

Special ``_`` variable
-------------------------

There is a special variable ``_`` in interactive mode. It stores the result of the
last evaluation (*except* ``None``), stored in the :mod:`builtins` module.

For example:

>>> 1 + 2
3
>>> _
3
>>> print("1+2=3")
1+2=3
>>> _ # Doesn't store None returned by print()
3
>>> _+4
7

.. _tut-scripts:

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