HP HP-11C User Manual

Section 5: Programming Basics 89
you may want the program to pause so that you can quickly view
results before the program automatically resumes running. Two
keys, (run/stop) and (pause), are used for program
interruptions.
Planned Stops During Program Execution
The (run/stop) function can be used either as an instruction in
a program or as an operation pressed from the keyboard.
When pressed from the keyboard:
1. Ifaprogram isrunning, halts program execution.
2. If a program is stopped or not running, and the calculator is
in Run mode, pressing starts the program running.
Execution then begins with the first line of program memory
following the instruction. (When is pressed and
held in Run mode, it displays the line number and keycode of
that current line—when released, execution begins with that
line.)
You can use these features of the instruction to stop a running
program at points where you want to key in data. After the data
has been keyed in, restart the program using the key from the
keyboard.
Example: Universal Tins, a can-
ning company, needs to calculate the
volumes of various cylindrically
shaped cans. Universal would also
like to be able to record the area of the
base of each can before the volume is
calculated.
The following program calculates the area of the base of each can
and then stops. After you have written down the result, the
program can be restarted to calculate the final volume. The
formula used is:
Volume = base area X height = 7r2 X h

HP HP-11C Specifications

General

Brand	HP
Model	HP-11C
Category	Calculator
Language	English