Chapter 17: Programming 279
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 279 of 40
Depending on the commands in the program, the TI-89 / TI-92 Plus
automatically displays information on the applicable screen.
¦ Most output and input commands use the Program I/O screen.
(Input commands prompt the user to enter information.)
¦ Graph-related commands typically use the Graph screen.
After the program stops, the TI-89 / TI-92 Plus shows the last screen
that was displayed.
On the Program I/O screen, new output is displayed below any
previous output (which may have been displayed earlier in the same
program or a different program). After a full page of output, the
previous output scrolls off the top of the screen.
When a program stops on the Program I/O screen, you need to
recognize that it is not the Home screen (although the two screens
are similar). The Program I/O screen is used only to display output or
to prompt the user for input. You cannot perform calculations on this
screen.
From the Program I/O screen:
¦ Press ‡ to toggle between the Home screen and the Program I/O
screen.
— or —
¦ Press N, 2K, or
TI.89: "
TI.92 Plus: ¥"
to display the Home screen.
— or —
¦ Display any other application screen (with O, ¥#, etc.).
Where Is the Output
Displayed?
The Program I/O
Screen
Tip: To clear any previous
output, enter the
Clr[O
command in your program.
You can also execute
Clr[O
from the Home screen.
Tip: If Home screen
calculations don’t work after
y
ou run a program, you may
be on the Program I/O
screen.
Leaving the
Program I/O Screen
Last output
On the Program I/O screen:
• ‡ toolbar is available; all
others are dimmed.
• There is no entry line.