loom:~# echo $FOO

loom:~# FOO=bar
loom:~# echo $FOO
bar
loom:~# bash
loom:~# echo $FOO

loom:~# exit
loom:~# export FOO=bar
loom:~# bash
loom:~# echo $FOO
bar
loom:~# exit
loom:~#
loom:~# export FOO[2]=foobar
-su: export: `FOO[2]': not a valid identifier
loom:~# FOO[2]=foobar
loom:~# export FOO
loom:~# bash
loom:~# echo ${FOO[2]}

loom:~# wtf?
bash: wtf?: command not found
loom:~# declare -ax IPADD_NEW='([0]="foooo")'
loom:~# echo ${IPADD_NEW[0]}
foooo
loom:~#