Please review the following instructor created content. It can be viewed as either a Prezi presentation (audio can be turned off or on) or as a PowerPoint presentation.
If the Prezi does not appear, check to see if a pop up blocker is keeping you from viewing it. Typically, it appears as a shield in the right hand corner up by the close button (red x). Click on the shield, click on "load unsafe script", click on "done", and the Prezi will appear.
For presentation slides, go here: Basic Coding Lecture - Notes for Chapter 9 (PPT)