Erlang (programming language) > Tutorials > Hello
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Hello World (serial)
Code Example
-module(hello).
-export([start/0]).
start() ->
io:format("Hello, world!\n").
Analysis of the example
The Hello World program (see above) appears in many programming languages books and articles as a cursory introduction into a language's syntax. The first hello world program was introduced in the book The C Programming Language[1].
-module(hello) tells the compiler to create a new module(library) called hello. The code tells us the file name for this code: hello.erl.
-export([start/0]). exports a function named start with 0 arguments to the world outside of this module called hello.
start() -> tells the compiler that there is a function named start() with no arguments.
io:format("Hello, world!\n"). will make the program output Hello, world! and a new line (\n) on the screen.
