Texas Instruments TI-89 Manual Book page 294

Steps
5. Go to the Home screen. Enter
the program name, followed by a
set of parentheses.
You must include ( ) even when there
are no arguments for the program.
The program displays a dialog box
with the prompt specified in the
program.
6. Type 5 in the displayed dialog
box.
7. Continue with the program. The
command displays the
Disp
result on the Program I/O
screen.
The result is the sum of the integers
from 1 through 5.
Although the Program I/O screen
looks similar to the Home screen, it is
for program input and output only.
You cannot perform calculations on
the Program I/O screen.
8. Leave the Program I/O screen
and return to the Home screen.
You can also press N , 2 K , or
TI.89: "
TI.92 Plus: ¥"
to return to the Home screen.
³
TI-89 TI-92 Plus
Keystrokes Keystrokes
" ¥ "
2 ™ P R O G P R O G
j 1 1
c d ¸ c d ¸
5 5
¸ ¸ ¸ ¸
‡ ‡
›
Display
prog1()
Output from other
programs may still be
on the screen.
Result of integer 5.
Chapter 17: Programming 277