Hello World

Let's make sure everything is working by making a simple 'Hello, World!' program.

Make a file called hello.tl:

fun hello_world():
  io.format("Hello, World!~n", [])

Then we compile the program:

tele compile hello.tl

This will make a file hello.erl:

-module(hello).
-export([hello_world/0]).

hello_world() ->
    io:format(<<"Hello, World!~n"/utf8>>, []).

We can fire up the Erlang REPL and call the function of this Erlang module we made:

Start the REPL like this:

erl

Compile the Erlang module hello.erl.

c(hello).

Then call our hello_world method from the hello module.

hello:hello_world().
=> Hello, World!

```