Texas Instruments 83CML/ILI/U Guidebook - Page 303
Entering Command Lines and Executing Programs
UPC - 033317193318
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Entering Command Lines and Executing Programs Entering a Program Command Line You can enter on a command line any 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; long command lines wrap to the next screen line. 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. • Press '. 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 (page 16.15 and page 16.22). Executing a Program Breaking a Program To execute a program, begin on a blank line on the home screen and follow these steps. 1. Press to display the PRGM EXEC menu. 2. Select a program name from the PRGM EXEC menu (page 16.7). prgmname is pasted to the home screen (for example, prgmCYLINDER). 3. Press Í to execute the program. While the program is executing, the busy indicator is on. Last Answer (Ans) is updated during program execution. Last Entry is not updated as each command is executed (Chapter 1). The TI-83 checks for errors during program execution. It does not check for errors as you enter a program. To stop program execution, press É. The ERR:BREAK menu is displayed. • To return to the home screen, select 1:Quit. • To go where the interruption occurred, select 2:Goto. Programming 16-5
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