EasyManua.ls Logo

HP HP-28S User Manual

HP HP-28S
341 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #183 background imageLoading...
Page #183 background image
20
Memory
Memory
is
used
for a variety
of
purposes
in
the
HP-28S,
including
the
command
line,
the
stack,
user
memory, recovery features,
and
the
operating
system.
The
command
line
and
the
stack are described in
chapters 18
and
19. This
chapter
primarily discusses
user
memory,
including directories; it also discusses
low-memory
conditions
and
its
effects
on
recovery features
and
the
operating
system.
User
Memory
User
memory
can contain variables,
and
it can contain directories to
organize the variables.
Global Variables
A variable
is
the
combination
of a
name
object
and
any
other
object.
The
name
object represents
the
name
of
the
variable;
the
other
object
is
the
value or
contents
of
the
variable.
Global variables are those
that
are stored in user memory. There are
also local variables,
which
are created
by
program
structures
and
exist
only
during
execution
of
the
program
structures. Local variables
are
primarily a substitute for stack
manipulations
and
are described in
chapter
19, "The Stack." In
the
present
chapter,
the
term
"variables"
indicates global variables.
The contents
of
a variable
can
be
any
type
of
object. In
part
1 you
created numerical variables,
program
variables, algebraic variables, list
variables,
and
array variables.
You
even created
name
variables,
where
the
contents
of
the
variable
was
the
name
of
another
variable.
182
20:
Memory

Table of Contents

Other manuals for HP HP-28S

Preview: Quick Reference
Quick Reference49 pages
Preview: Owner's Manual
Owner's Manual341 pages
Question and Answer IconNeed help?

Do you have a question about the HP HP-28S and is the answer not in the manual?

HP HP-28S Specifications

General IconGeneral
Introduced1988
Memory32 KB
Number of Digits12
TypeScientific Calculator
ManufacturerHewlett-Packard (HP)
DisplayLCD
ProcessorSaturn
ProgrammingRPL

Summary

HP-28S Advanced Scientific Calculator Owner's Manual

Part 1: Fundamentals

Introduces basic operations, calculator features, and core concepts.

Getting Started

Covers initial setup, basic operations, and calculator overview.

Doing Arithmetic

Explains methods for performing calculations using stack and expressions.

Part 2: Summary of Calculator Features

Objects

Describes fundamental data types, symbolic operations, and programming elements.

The Command Line

Explains input methods, cursor control, and command entry.

The Stack

Reviews stack concepts and commands for manipulating objects.

Part 3: Programming

Program Structures

Covers conditional logic, loops, and error handling in programs.

Conditional Structures

Explains testing conditions and making decisions within programs.

Definite Loop Structures

Details structures for executing code a specific number of times.

Appendixes & Indexes

Appendix A: Assistance, Batteries, and Service

Provides troubleshooting, battery info, and service details.

Answers to Common Questions

Addresses frequent user queries and common calculator issues.

Appendix B: Notes for HP RPN Calculator Users

Highlights differences for users familiar with RPN calculators.

Appendix D: Menu Map

Lists commands by menu, with descriptions and page references.

Contacting Hewlett-Packard

Related product manuals