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not - negate the exit status of a job
=====================================
Synopsis
--------
.. synopsis::
not COMMAND [OPTIONS ...]
! COMMAND [OPTIONS ...]
Description
-----------
``not`` negates the exit status of another command. If the exit status is zero, ``not`` returns 1. Otherwise, ``not`` returns 0.
Some other shells only support the ``!`` alias.
The **-h** or **--help** option displays help about using this command.
Example
-------
The following code reports an error and exits if no file named spoon can be found.
::
if not test -f spoon
echo There is no spoon
exit 1
end
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