######## [my app]/app/controllers/hello_controller.rb #########
class HelloController < ApplicationController

  def index
    
  end
  
  
  def world
    @greeting = "hello world!" 
  end
  
end


###### [my app]/app/views/hello/index.rhtml
<h1>Hello#index</h1>
<p>Find me in -- app/views/hello/index.rhtml</p>
<%= @greeting %>




##### [my app]/app/views/hello/world.rhtml
<%= @greeting %>