Question

Suppose I have some code:

let listB = [ 1; 2; 3 ]   

Using Lisp notation, how do I do a car and cadr against this list? I know cons is ::.

Or in Scheme, first and rest?

Answer 1

List.head: Returns the first element of a nonempty list (The head of the list).

List.tail: Returns all the elements of a nonempty list except the first (The tail or rest of the list).

Example (using F# Interactive Console):

> let sample = [1;2;3;4];;  val sample : int list  > List.head sample;;  val it : int = 1  > List.tail sample;;  val it : int list = [2; 3; 4]