Complementing a tutorial video with ruby code. Part 2. Hello World

hello_world.rb

# hello_world.rb
# This will manage routes and display the content.
# I am sure, you did watch the video before checking this out.

require "sinatra"

set :bind, '127.0.0.1'
set :port, '8080'

get '/hello/:name' do
  "Hello #{params[:name]}!"
end