Chapter 16: Programming
275
Chapter 16:
Programming
Getting Started: Volume of a Cylinder
Getting Started is a fast-paced introduction. Read the chapter for details.
A program is a set of commands that the TI-84 Plus executes sequentially, as if you had entered
them from the keyboard. Create a program that prompts for the radius R and the height H of a
cylinder and then computes its volume.
1. Press
~
~
to display the
PRGM NEW
menu.
2. Press
Í
to select
1:Create New
. The
Name=
prompt is displayed, and alpha-lock is on. Press
C
Y L I N D E R
, and then press
Í
to name the
program
CYLINDER
.
You are now in the program editor. The colon (
:
)
in the first column of the second line indicates the
beginning of a command line.
3. Press
~
2
to select
2:Prompt
from the
PRGM I/O
menu.
Prompt
is copied to the command
line. Press
ƒ
R
¢ ƒ
H
to enter the
variable names for radius and height. Press
Í
.
4. Press
y B ƒ
R
¡ ƒ
H
¿ ƒ
V
Í
to enter the expression
p
R
2
H and store it to
the variable
V
.
5. Press
~
3
to select
3:Disp
from the
PRGM I/O
menu.
Disp
is pasted to the command
line. Press
y 7
[
ã
] V O L U M E
O
I S [
ã
]
ƒ
¢
ƒ
V
Í
to set up the program to
display the text
VOLUME IS
on one line and the
calculated value of
V
on the next.
6. Press
y
5
to display the home screen.
