Texas Instruments TI-92 Getting Started page 35

5.10.1 Entering a Program: The TI-92 is a programmable calculator that can store sequences of commands for later
replay. Here's an example to show you how to enter a useful program that solves quadratic equations by the
quadratic formula.
Press APPS 7[Program Editor] to access the programming menu. The TI-92 has space for many programs, each
named by a name you give it. To create a new program now, start by pressing APPS 7[Program Editor] 3[New].
Set the Type to Program and the Folder to main (unless you have another folder in which you want to have the
program). Enter a descriptive title for the program in the Variable line. Name this program Quadrat and press
ENTER twice to go to the program editor. The program name and the beginning and ending commands of the
program are automatically displayed with the cursor on the first line after Prgm, the begin program command.
In the program, each line begins with a colon : supplied automatically by the calculator. Any command you could
enter directly in the TI-92's Home screen can be entered as a line in a program. There are also special programming
commands.
Input the program Quadrat by pressing the keystrokes given in the listing below. You may interrupt program input
at any stage by pressing 2nd QUIT. To return later for more editing, press APPS 7[Program Editor] 2[Open],
move the cursor down to the Variable list, highlight this program's name, and press ENTER twice.
Each time you press ENTER while writing a program, the TI-92 automatically inserts the : character at the
beginning of the next line.
The instruction manual for your TI-92 gives detailed information about programming. Refer to it to learn more
about programming and how to use other features of your calculator.
Note that this program makes use of the TI-92's ability to compute complex numbers. Make sure that Complex
Format on the MODE screen (Figure 5.1) is set to RECTANGULAR.
Enter the program Quadrat by pressing the given keystrokes. A space entered by using the spacebar on the
keyboard is indicated by .
Program Line
: Input "Enter a", a
displays the words ENTER A on the TI-92 screen and waits for you to input a value that will be
assigned to the variable A
: Input "Enter b", b
: Input "Enter c", c
2
: b – 4 * a * c → d
calculates the discriminant and stores its value as d
3 5
Graphing Technology Guide: TI-92
5.10 Programming
Copyright © Houghton Mifflin Company. All rights reserved.
Keystrokes
I N P U T 2nd " E N T E R
I N P U T 2nd " E N T E R
I N P U T 2nd " E N T E R
B ∧ 2 – 4 × A × C STO➧ D ENTER
A 2nd ", A ENTER
B 2nd ", B ENTER
C 2nd ", C ENTER