--- ## Title 1 ### Title 2 Code segment in a paragraph:`echo 'Hello world!'` Code segment ```C #include <stdio.h> int main(void) { printf("Hello world!"); return 0; } ``` ```ruby #!/usr/bin/env ruby # frozen_string_literal: true require 'sinatra/base' class MyApp < Sinatra::Base get '/' do haml :index end end ```