TI-83/TI-84 BASIC Tutorial #5
Graph Screen
Plain old text can get boring after a while, so you may find the need to use the graph screen to draw some things. Let's start out with coordinates. The area of the screen that you can use in a basic program is 95 pixels wide by 63 pixels high. To properly draw things, you should set the window cordinates. In your program you should do this:
:0Xmin:94
Why do you start at 0 instead of 1, you ask? Well, in programming it's common practice to start thigs with 0. It might not always work to your advantage, but overall, it ends up making things easier.
To be continued..