linux, how to define a new array in bash

building arrays in linux

1 an array

https://www.youtube.com/watch?v=rpYNIjd6HHU

#!/usr/bin/env bash
declare -a ARRAY
ARRAY[0]=2
ARRAY[1]=0
ARRAY[2]=1
ARRAY[3]=7
echo ${ARRAY[@]}

2 multi-array

https://www.youtube.com/watch?v=p4ZHbf4_6IU