Arithmetic operation on all elements in BASH array -

say have bash array integers:

declare -a arr=( 1 2 3 ) 

and want arithmetic operation on each element, e.g. add 1. there altenative loop:

for (( i=0 ; i<=${#arr[@]}-1 ; i++ )) ;     arr[$i]=$(( ${arr[$i]} + 1 )) done 

i have tried few options:

arr=$(( ${arr[@]} + 1 )) 

fails, while

arr=$(( $arr + 1 )) 

results in

echo ${arr[@]} 2 2 3 

thus first (zeroth) element being changed.

i read awk solutions, know if bash arithmetics support such batch operations on each array element.

i know question not fresh new can accomplish want declaring array integer , applying substitution:

declare -ia arr=( 1 2 3 ) value=1  declare -ia 'arr_added=( "${arr[@]/%/+$value}" )' echo "arr_added: ${arr_added[*]}"  value=42 declare -ia 'arr_added=( "${arr[@]/%/+$value}" )' echo "arr_added: ${arr_added[*]}" 

it outputs:

arr_added: 2 3 4 arr_added: 43 44 45 

you can perform other math operations well:

value=3 declare -ia 'arr_multd=( "${arr[@]/%/*$value}" )' echo "arr_multd: ${arr_multd[*]}" 

outputs:

arr_multd: 3 6 9