declare
Declare variables and give them attributes.
TLDR
Declare a string variable with the specified value
$ declare [variable]="[value]"
Declare an integer variable with the specified value
$ declare -i [variable]="[value]"
Declare an array variable with the specified value
$ declare -a [variable]=([item_a item_b item_c])
Declare an associative array variable with the specified value
$ declare -A [variable]=([[key_a]=item_a [key_b]=item_b [key_c]=item_c])
Declare a readonly string variable with the specified value
$ declare -r [variable]="[value]"
Declare a global variable within a function with the specified value
$ declare -g [variable]="[value]"
