Erlang Programming/Creating Web Applications with yaws/First Yaws Webapp

Files using the file ending suffix ".yaws" will be processed by Yaws dynamic compiler where embedded Erlang code can be written amongst the HTML, as such:

When a .yaws file is processed by Yaws, the dynamic compiler in Yaws will single out any tags, compile the erlang code contained within an tag and cache the compiled resulting binary. Yaws will then during the execution of the Erlang code call the function out/1 in each binary with the Arg data structure supplied as the parameter and output the results. In this case, because out/1 returns to Yaws the tuple {html, String}, Yaws will assume the String is html and forward the String to the client.