HP 15c Collector's Edition User Manual

Section 1: Getting Started 21
Clearing Sequence Effect
´ CLEAR M
In Run mode: Repositions program memory to line 000.
In Program mode: Deletes all program memory.
´ CLEAR Q
Clears all data storage registers.
´ CLEAR u
*
Clears any prefix from a partially entered
key sequence.
*
Also temporarily displays the mantissa.
Display Clearing: ` and −
The HP 15c has two types of display clearing operations: ` (clear X)
and − (back arrow).
In Run mode:
 ` clears the display to zero.
 − deletes only the last digit in the display if digit entry has not
been terminated by v or most other functions. You can then
key in a new digit or digits to replace the one(s) deleted. If digit entry
has been terminated, then − acts like `.
Keystrokes Display
12345
12,345
Digit entry not terminated.
−
1,234
Clears only the last digit.
9
12,349
¤
111.1261
Terminates digit entry.
−
0.0000
Clears all digits to zero.
In Program mode:
 ` is programmable: it is stored as a programmed instruction,
and will not delete the currently displayed instruction.
 − is not programmable, so it can be used for program correction.
Pressing − will delete the entire instruction currently displayed.

HP 15c Collector's Edition Specifications

General

Model	HP 15c Collector's Edition
Category	Calculator
Type	Scientific
Power Source	Battery
Manufacturer	HP
Display	LCD
Functions	complex numbers, matrix operations

Summary

Introduction

This Handbook

Outlines the structure of the manual, detailing its parts and how to use it for learning.

The HP Community

Discusses user groups and websites for HP calculator enthusiasts and information sharing.

Part I: HP 15c Fundamentals

Section 1: Getting Started

Covers basic operations like powering on, keyboard layout, and primary/alternate functions.

Section 2: Numeric Functions

Explains essential numeric operations including logs, trig, powers, and conversions.

Section 3: The Automatic Memory Stack, LAST X, and Data Storage

Details the RPN stack, LAST X register, and data storage operations.

Part II: HP 15c Programming

Section 6: Programming Basics

Introduces core programming concepts: creating, loading, running programs, and memory.

Section 8: Program Branching and Controls

Covers controlling program flow using branching, loops, and conditional tests.

Part III: HP 15c Advanced Functions

Section 11: Calculating With Complex Numbers

Covers entering, manipulating, and performing calculations with complex numbers.

Section 12: Calculating With Matrices

Explains matrix operations, including dimensioning, element access, and calculations.

Section 13: Finding the Roots of an Equation

Details using the SOLVE function for numerical root finding and equation solving.

Section 14: Numerical Integration

Explains how to perform numerical integration using the ∫f(x)dx key and subroutines.

Appendix A: Error Conditions

Error 8: No Root

Explains the error when the SOLVE function cannot find a root.

Error 0: Improper Mathematics Operation

Lists and explains errors related to mathematical operations and illegal arguments.

Appendix D: A Detailed Look at SOLVE

How SOLVE Works

Explains the numerical technique and logic behind the SOLVE algorithm.

Finding Several Roots

Discusses methods for finding multiple roots of an equation using the SOLVE function.