Goal: Practice creating an entire application with well-separated Business and User Interface logic. In this lesson we will create our back-end or Business logic, and in the following we will build out our User Interface or front-end logic.
parseInt()do? When should we use it?
Revisit your old calculator project from that exercise, and add functionality to subtract, divide and multiply numbers, too.
Then, follow along with the next few lessons to add a front-end user interface to our calculator using jQuery.