How does one print any type?

Learning
16

you can load the file and then just “call the variable with the type and value you want”. e.g.

type foo =
  | Nothing (* Constnat *)
  | Int of int (* Int constructor with value Int int *)
  | Pair of int * int (* Pair constructor with value as pair of ints *)
  | String of string;; (* constructor String that has the value string *)

let nada = Nothing;;

then:

utop

then:

 #use "datatypes.ml";;
let nada = Nothing;;

then that calls

nada;;
- : foo = Nothing