HP 15c Collector's Edition User Manual

22 Section 1: Getting Started
Calculations
One-Number Functions
A one-number function performs an operation using only the number in
the display. To use any one-number function, press the function key after
the number has been placed in the display.
Keystrokes
Display
45
45
| o
1.6532
Two-Number Functions and v
A two-number function must have two numbers present in the calculator
before executing the function. +, -, *, and ÷ are examples of
two-number functions.
Terminating Digit Entry. When keying in two numbers to perform an
operation, the calculator needs a signal that digit entry is terminated for
the first number. This is done by pressing v to separate the two
numbers. If, on the other hand, one of the numbers is already in the
calculator as the result of a previous operation, you do not need to use
the v key. All functions except the digit entry keys themselves
*
have the effect of terminating digit entry.
Notice that, regardless of the number, a decimal point always appears
and a set number of decimal places are displayed when you terminate
digit entry (as by pressing v).
Chain Calculations. In the following calculations, notice that:
 The v key is used only for separating the sequential entry of
two numbers.
 The operator is keyed in only after both operands are in the
calculator.
 The result of any operation may itself become an operand. Such
intermediate results are stored and retrieved on a last-in, first-out
basis. New digits keyed in following an operation are treated as a
new number.
*
The digit keys, ., ”, “, and −.

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.