# test of redone post-increment and post-decrement code echo $(( 4-- )) echo $(( 4++ )) echo $(( 4 -- )) echo $(( 4 ++ )) (( array[0]++ )) echo ${array} (( array[0] ++ )) echo ${array} (( a++ )) echo $a (( a ++ )) echo $a echo $(( a ++ + 4 )) echo $a echo $(( a+++4 )) echo $a echo $(( a---4 )) echo $a echo $(( a -- + 4 )) echo $a echo $(( a -- - 4 )) echo $a (( ++ + 7 )) (( ++ )) echo $(( +++7 )) echo $(( ++ + 7 )) (( -- ))