Learn Interfaces by Building an Equation Solver - Step 38

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Learn Interfaces by Building an Equation Solver - Step 17

A class is a blueprint for a building. In the building there will be a boardroom. Since this is just a blueprint, and you don’t know what someone would call a building they make for it, you refer to the boardroom as self.boardroom Later, someone uses the blueprint to make a building called Skytower. Well when you want to refer to the boardroom in that building it’s called Skytower.boardroom. Much later someone makes a building using the same blueprint called Skypiercer. When you refer to that …