Bash: array variables

declare -a ary

ary+=( one   )
ary+=( two   )
ary+=( three )

echo ${ary[2]}
echo ${ary[1]}
echo ${ary[0]}
# three
# two
# one

echo ---------
echo ${ary[*]}
# one two three

echo ---------
printf "%s\n" "${ary[@]}"
# one
# two
# three