person.rb

class Person
  attr_accessor :balance

  Inf = 1.0/0.0
  def balance_test
    puts "Your balance measurement is: #@balance"
    case balance
    when 500...Inf
      "You could be a gymnast"
    when 100...500
      "You have normal balance"
    else
      "You either have terrible balance or drank too much"
    end
  end
end

gymnast = Person.new
gymnast.balance = 100000000
p gymnast.balance_test

drunkard = Person.new
drunkard.balance = 50
p drunkard.balance_test