In ruby how to use class level local variable? (a ruby newbie's question)

Question

So suppose I have this (not working):

class User
   description = \"I am User class variable\"
   def print
       puts description
   end
end

Answer 1

Instance variables must be prefixed with an @ and are not accessible from outside. Class variables must be prefixed with an @@.

The first time you use this variable anywhere in code, it will be initialized. If you want to access the value from outside:

attr_reader :description

http://rubylearning.com/satishtalim/tutorial.html