You can enter on a command line any command, instruction, or expression that you could execute from the home screen. In the program editor, each new command line begins with a colon. To enter more than one instruction or expression on a single command line, separate each with a colon.
Note: A command line can be longer than the screen is wide.
While in the program editor, you can display and select from menus. You can return to the program editor from a menu in either of two ways.
| • | Select a menu item, which pastes the item to the current command line. |
— or —
| • | Press u. |
When you complete a command line, press Í. The cursor moves to the next command line.
Programs can access variables, lists, matrices, and strings saved in memory. If a program stores a new value to a variable, list, matrix, or string, the program changes the value in memory during execution.
You can call another program as a subroutine.