learning Erlang step by step[1]

A popular program for Erlang beginners is "Hello, World". We can write the following code and save it in a file called hello.erl:

-module(hello).

 -export([start/0]).  

start() ->io:format("Hello, World!~n").

Then, we can open the Erlang Shell, where we can write and run small amounts of Erlang code. Enter the following commands to run the Hello World program:

% Compile the module

 c(hello). 

 % Run the function 

hello:start().