Example of an ILE RPG Program

Each RPG IV indicator has a two-character

name (for example, LR, 01,

referred

to

in

some

entries

of

some

specifications

just

by the two-c

and

in others

by the

special name *INxx where

xx

is

the

two-charact

can

use

several

types

of these

indicators;

each type

signals

somethin

The

positions

on

the

specification

in

which

you define an indicator de

use of the indicator. Once you define an

indicator

in

your

program,

control calculation and output operations.

 

 

 

 

 

 

 

Indicator

variables

can

be

used

any

place

an

indicator

of

the form

used with the exception of the OFLIND and EXTIND keywords on the fil description specifications.

An RPG program sets and resets certain indicators at specific times d program cycle. In addition, the state of indicators can be changed lation operations.

Operation Codes

The RPG IV programming language allows you to do many different types

ations on your Operationdata. codes , entered on the calculation specifications, indicate what operations will be done. For example, if you want to re record, you could READuse operationthe code. The following is a list of the operations available.

Arithmetic operations

Indicator-setting operations

Array operations

Information operations

Bit operations

Initialization operations

Branching operations

Memory Management Operations

Call operations

Message operation

Compare operations

Move operations

Data-Area operations

String operations

Date/Time/Timestamp operations

Structured programming operations

Declarative operations

Subroutine operations

File operations

Test operations

Example of an ILE RPG

Program

This

section illustrates a simple ILE RPG program that performs payroll c

lations.

Problem

Statement

The payroll department of a small company wants to create a print outpu employees' pay for that week. Assume there are two disk files, EMPLOYEE TRANSACT, on the system.

The first file, EMPLOYEE, contains employee records. The figure below sh format of an employee record:

EMP_REC

EMP_NUMBER

EMP_NAME

EMP_RATE

1

6

22

27

6 ILE RPG for AS/400 Programmer's Guide

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IBM AS/400 manual Operation Codes, Example of an ILE RPG Program, Statement

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.