The Bash shell makes it possible to create arrays: https://gnu.org/software/bash/manual/html_node/Arrays
Dash shell currently does not have this feature. A workaround is to use ARGV:
$ set aaa bbb ccc
$ echo "$2"
bbb
However this is limited as only one array can exist at a time, while Bash allows
multiple arrays to exist at a time:
$ gg=(aaa bbb ccc)
$ hh=(ddd eee fff)
$ echo "${gg[1]} ${hh[1]}"
bbb eee
