# define a class

class Box

   BOX_COMPANY = "TATA Inc"

   BOXWEIGHT = 10

   # constructor method

   def initialize(w,h)

      @width, @height = w, h

   end

   # instance method

   def getArea

      @width * @height

   end

end

​

# create an object

box = Box.new(10, 20)

​

# call instance methods

a = box.getArea()

puts "Area of the box is : #{a}"

puts Box::BOX_COMPANY

puts "Box weight is: #{Box::BOXWEIGHT}"

​