Now that we are building larger functions, we might like to store them between sessions, rather than typing them in every time. For example, compose a file like this in a text editor:
Save the file in same directory (folder) as you enter OCaml from,
under the name lists.ml. We can then tell OCaml to use the
contents of that file like this:
It is exactly the same as typing it in manually – the functions
length and append will now be available for
use. Errors and warnings will be reported as usual. Note that the
#use command is not part of the OCaml language for
expressions – it is just a command we are giving to OCaml.