nth - This function returns the Nth item in a list. The first item in a list is item zero.
Syntax : (nth integer list)
integer - Any valid integer.
list - Any valid list.
(nth) returns "Error: Too Few Arguments" [cons requires an item and a list]
(nth 2 1 2 3) returns "Error: Bad Argument Type" [nth requires an integer and a list]
(nth 2 (list "cde" "Jeff" "Sanders")) returns "Sanders"
(nth 0 (list 1 2 3)) returns 1
(nth 1 (list 1 2 3)) returns 2
(nth 2 (list 1 2 3)) returns 3
(nth 1 (list "a" (list "b" "c") "d")) returns ("b" "c")
(nth 4 (list 1 2 3 5 6 7)) returns 6
