HP 48GII User Manual

RPL Programming 1-25
Using Summations Instead of Loops
For certain calculations that involve summations, you can use the Σ function instead of loops. You can use Σ
with stack syntax or with algebraic syntax. Σ automatically repeats the addition for the specified range of the
index variable — without using a loop structure.
Example: The following programs take an integer upper limit n from the stack, then find the summation. One
program uses a FOR … NEXT loop — the other uses Σ.
Program: Comments:
"!
8!3!KL:!
7LK!^!
^!DU!'!
=<T:
Initializes the summation and puts
the limits in place.
Loops through the calculation.
»
Program: Comments:
"!
#!G!
+\-^[3FGF^WH/+
Uses Σ to calculate the summation.
»
Example: The following program uses ΣLIST to calculate the summation of all elements of a vector or matrix.
The program takes from the stack an array or a name that evaluates to an array, and returns the summation.
Program: Comments:
"!
LS_#!
3!
'!
`E6D:!
#E6D:!
\E6D:
Finds the dimensions of the array and
leaves it in a list on level 1.
Adds 1 to the list. (If the array is a vector,
the list on level 1 has only one element.
ΠLIST will error if the list has fewer than
two elements.)
Multiplies all of the list elements together.
Converts the array elements into a list, and
sums them.
»
Using Flags
You can use flags to control calculator behavior and program execution. You can think of a flag as a switch that
is either on (set) or off (clear). You can test a flag's state within a conditional or loop structure to make a
j
2
j 1=
n
∑

HP 48GII Specifications

General

Battery type	CR2032
Type	Scientific
Form factor	Pocket

Weight and Dimensions

Weight	220 g
Dimensions (WxDxH)	184 x 87 x 23.5 mm

Summary

RPL Programming

Understanding Programs

Programs as objects, delimiters, and basic structure.

Entering and Executing Programs

Details on how to create, store, and run programs.

Using Conditional Structures

Covers IF, CASE, IFT, IFTE structures for program decision-making.

Input and Output Commands

Details commands like PROMPT, INPUT, INFORM, CHOOSE for user interaction.

RPL Programming Examples

Fibonacci Numbers

Demonstrates recursive and loop-based Fibonacci calculations.

Minimum and Maximum Array Elements

Details finding min/max elements using MNX and MNX2.

Applying a Program to an Array

Explains the APLY command for transforming array elements.

Full Command and Function Reference

How to Access Commands and Functions

Explains key presses and menu paths to access commands.

ABS (Absolute Value)

Details the absolute value function and its array behavior.

ACOS (Arc Cosine)

Explains the inverse cosine function, domain, and range.

Computer Algebra Commands

CAS Operations

Overview of CAS operations and their categorization by menu.

Algebra commands

Lists and describes commands for algebraic manipulation.

Calculus Commands

Covers derivation, integration, and limit commands.

Equation Reference

Columns and Beams (1)

Provides equations for structural mechanics.

Electricity (2)

Lists equations related to electrical circuits and laws.

Fluids (3)

Covers equations for fluid mechanics.

The Development Library

Introduction

Explains the purpose and usage of the development library.

Tools for Development

Details APEEK, PEEK, POKE, POKEARM commands.

MASD Compiler

Discusses syntax, modes, and directives for MASD.

Error and Status Messages

Messages Listed Alphabetically

Alphabetical list of error messages.

Messages Listed Numerically

Numerical list of error messages by hex code.

System Flags

System Flags (continued)

Description of various system flags.

System Flags (continued)

Continuation of system flags description.

Reserved Variables

Contents of the Reserved Variables

Explanation of key reserved variables.

PPAR

Details plotting parameters.

Technical Reference

Object Sizes

Lists object sizes in bytes.

Symbolic Integration Patterns

Provides a table of symbolic integration patterns.

Parallel Processing With Lists

General rules for parallel processing

Explains conditions for parallel list processing.

Group 4: ADD and +

Describes how ADD and + handle parallel list operations.

Keyboard Shortcuts

Press and Hold key combinations

Lists functions performed by key combinations.

Shifted softkeys

Explains shift key effects on menu labels.

The Menu-Number Table

-- menus 0-117 are semi-compatible with 48G menus --

Menu numbers and paths for built-in menus.

-- New Library 222 commands --

Details commands available in Library 222.