title: How to restart or reuse a case statement in Ruby?
body: <p>After going through the <a href="http://www.codecademy.com/courses/ruby-beginner-en-0i8v1/0/1?curriculum_id=5059f8619189a5000201fbcb" rel="nofollow">codecademy</a> ruby section "A Night at the Movies", I wanted to extend the case-statement to allow input again. By the end my code was:</p>
  
  <pre><code>movies = {
    living_torah: 5,
    ushpizin: 5
  }
  
  def input #method for gets.chomp
      gets.chomp.downcase
  end
  
  puts "To exit please type 'Quit' or 'Exit'"
  puts 'Please type "add", "display", "update" or "delete".'
  choice = input
  
  case choice
      when "add"
          puts "Movie Title please:"
          title = input.to_sym
          puts "How would you rate it?"
          rating = input.to_i
          if movies[title].nil?
              movies[title] = rating
              puts "Movie: '#{title.to_s.capitalize}' added with a Rating of # {rating}."
          else
              puts "That Movie already exists. Try updating it."
          end
      when "update"
          puts "Movie Title please:"
          title = input.to_sym
          if movies[title].nil?
              puts "That Title doesn't exist. Please 'add' it."
          else
              puts "Your Movie was found. How would you rate it?"
              rating = input.to_i
              movies[title] = rating
              puts "Movie: '#{title.to_s.capitalize}' updated with a Rating of #{rating}."
          end
      when "display"
          movies.each { |movie, rating| puts "#{movie}: #{rating}" }
      when "delete"
          puts "Which Movie would you like to delete?"
          title = input.to_sym
          if movies[title].nil?
              puts "That Title doesn't exist. Please 'add' it."
          else
              movies.delete(title)
              puts "The Movie '#{title.to_s.capitalize}' has been deleted."
          end
      when "exit", "quit"
          exit
      else
          puts "Invalid choice."
  end
  </code></pre>
  
  <p>I added the "exit" case independently of the exercise hoping to C.R.U.D. until explicitly exiting the program. How would I change the code to be able to restart/reuse the case-statement indefinitely?
  (Also, is there a simpler/shorter way to produce the same results as this case-statement?)</p>