How to import and use new modules in ocaml?

Question

I am unable to use module Extstring.

Answer 1

If you are running the toplevel, you need to have exstring.cmo in its path (the simple way is to run ocaml in the same directory as extstring.cmo). Then, you can do:

# #load "extstring.cmo";;
# Extstring.split "a.b" '.' 2;;
[..]