Texas Instruments PLUS TI-89 - Manual (Page 295)

278 Chapter 17: Programming
17PROGRM.DOC TI-89/TI-92 Plus: Programming (English) Susan Gullord Revised: 02/23/01 1:14 PM Printed: 02/23/01 2:18 PM Page 278 of 40
On the Home screen:
1. Type the name of the program.
2. You must always type a
set of parentheses after
the name.
Some programs require
you to pass an argument
to the program.
prog1()
prog1(x,y)
3. Press ¸.
When you run a program, the TI -89 / TI-92 Plus automatically checks
for errors. For example, the following message is displayed if you:
¦ Do not enter ( ) after the
program name.
This error message appears if you:
¦ Do not enter enough arguments,
if required.
To cancel program execution if an error occurs, press N. You can
then correct any problems and run the program again.
When a program is running, the BUSY indicator is displayed in the
status line.
Press ´ to stop program execution. A message is then displayed.
¦ To display the program in the
Program Editor, press ¸. The
cursor appears at the command
where the break occurred.
¦ To cancel program execution,
press N.
Running an Existing Program
After a program is created (as described in the remaining
sections of this chapter), you can run it from the Home screen.
The program’s output, if any, is displayed on the Program I/O
screen, in a dialog box, or on the Graph screen.
Running a Program
Tip: Use 2 ° to list
existing PRGM variables.
Highlight a variable and
press
¸ to paste its
name to the entry line.
Note: Arguments specify
initial values for a program.
Refer to page 283.
Note: The TI - 89 / TI - 92 Plus
also checks for run-time
errors that are found within
the program itself. Refer to
page 310.
“Breaking” a
Program
If arguments are required
If arguments are not required