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########################################################################
##
## Copyright (C) 2013-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING. If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {@var{dir} =} prefdir
## @deftypefnx {} {@var{dir} =} prefdir (1)
## Return the directory that holds the preferences for Octave.
##
## Examples:
##
## Display the preferences directory
##
## @example
## prefdir
## @end example
##
## Change to the preferences folder
##
## @example
## cd (prefdir)
## @end example
##
## If called with an argument, the preferences directory is created if it
## doesn't already exist.
## @seealso{getpref, setpref, addpref, rmpref, ispref}
## @end deftypefn
function dir = prefdir ()
dir = get_home_directory ();
if (nargin > 0)
if (! isfolder (dir))
mkdir (dir);
endif
endif
endfunction
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