The classical introductory exercise. Just say "Hello, World!".
"Hello, World!" is the traditional first program for beginning programming in a new language or environment.
The objectives are simple:
If everything goes well, you will be ready to fetch your first real exercise.
For installation and learning resources, refer to the exercism help page.
To work on the exercises, you will need
Base. Consult opam website for instructions on how to install
opam for your OS. Once
opam is installed open a terminal window and run the following command to install base:
opam install base
To run the tests you will need
OUnit. Install it using
opam install ounit
A Makefile is provided with a default target to compile your solution and run the tests. At the command line, type:
utop is a command line program which allows you to run Ocaml code interactively. The easiest way to install it is via opam:
opam install utop
Consult utop for more detail.
The exercism/ocaml repository on GitHub is the home for all of the Ocaml exercises.
If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue. We'll do our best to help you!
This is an exercise to introduce users to using Exercism http://en.wikipedia.org/wiki/%22Hello,_world!%22_program
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
open OUnit2 open Hello_world let ae exp got _test_ctxt = assert_equal ~printer:(fun x -> x) exp got let tests = [ "Say Hi!" >:: ae "Hello, World!" hello; ] let () = run_test_tt_main ("Hello World tests" >::: tests)
let hello = "Hello, World!"
A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.
Here are some questions to help you reflect on this solution and learn the most from it.