#rdoc_square.rb

# This class Square takes in side_length (of type float or fixnum)
# as argument
class Square

  # The length of a square's side
  attr_accessor :side_length

  # Retuns the area of the square
  def area
    @side_length * @side_length
  end

  # Returns perimeter of the square
  def perimeter
    4 * @side_length
  end
end