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