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

To define a class variable, use an @@:

class User
   @@description = "I am a User class variable"

   def print
       puts @@description
   end
end