Sample user model

user.rb

class User < ActiveRecord::Base
  def coolifier
    username = "#{username}...the Coolest!"
  end
  
  def make_cool
    cool = true
  end
end

# u = User.new(username: 'Swag')
# puts u.username
# "Swag"
# u.coolifier
# puts u.username
# "Swag...the coolest!"
# u.make_cool
# puts u.cool?
# true