This story was originally published on HackerNoon at: https://hackernoon.com/refactoring-014-how-to-remove-if. The first instruction you learned should be the least you use Check more stories related to programming at: https://hackernoon.com/c/programming. You can also check exclusive content about #clean-code, #software-development, #software-engineering, #if-elif-else, #clean-architecture, #refactoring, #remove-if-guide, #code-refactoring, and more. This story was written by: @mcsee. Learn more about this writer by checking @mcsee's about page, and for more stories, please visit hackernoon.com. Code Smell is a way of expressing the smell of a particular room. The code is written in Java. The algorithm is not open for extension and closed for modification. The "else" condition doesn't explicitly check for the 'on' state; it implicitly handles any state that is 'not off' The 'off' state is a constant representing the'off' state.