Of the many data structures that can be built out of cons cells, one of the most basic is called a proper list. A proper list is either the special (empty list) symbol, or a cons in which the points to a datum (which may be another cons structure, such as a list), and the points to another proper list.
Of the many data structures that can be built out of cons cells one of the most basic is called a proper list A proper list is either the special (empty list) symbol or a cons in which the points to a datum (which may be another cons structure such as a list) and the points to another proper list