#   This program 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.
#
#   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#
echo $(( --7 ))
echo $(( ++7 ))
echo $(( -- 7 ))
echo $(( ++ 7 ))

((++array[0] ))
echo $array
(( ++ array[0] ))
echo $array

(( ++a ))
echo $a
(( ++ a ))
echo $a

(( --a ))
echo $a
(( -- a ))
echo $a

echo $(( 4 + ++a ))
echo $a

echo $(( 4+++a ))
echo $a

echo $(( 4---a ))
echo $a

echo $(( 4 - -- a ))
echo $a

(( -- ))
echo $(( ---7 ))
echo $(( -- - 7 ))

(( ++ ))
echo $(( ++7 ))
echo $(( ++ + 7 ))

echo $(( ++-7 ))
echo $(( ++ - 7 ))

echo $(( +--7 ))
echo $(( -- + 7 ))