Declare local variables and give them attributes. See also:
declareandexport. More information: https://www.gnu.org/software/bash/manual/bash.html#index-local.
local {{variable}}="{{value}}"
local -i {{variable}}="{{value}}"
local {{variable}}=({{item_a item_b item_c}})
local -A {{variable}}=({{[key_a]=item_a [key_b]=item_b [key_c]=item_c}})
local -r {{variable}}="{{value}}"
local --help