Table

2

(Page 2 of

2). New Language Elements Since V4R2

 

 

 

 

 

 

 

 

 

Language

Unit

 

Element

 

Description

 

 

 

 

 

 

 

 

 

Operation

codesEVALR

 

Evaluates

an assignment statement

 

 

 

 

 

 

of the form result=expression.

The

 

 

 

 

 

result will be right-justified.

 

 

 

 

 

 

 

 

 

 

 

FOR

 

Begins a group of operations

and

 

 

 

 

 

indicates the number of times the

 

 

 

 

 

group is to be processed. The initial

 

 

 

 

 

increment, and limit values can be

 

 

 

 

 

free-form

expressions.

 

 

 

 

 

 

 

 

 

 

ENDFOR

 

ENDFOR ends a group of operations

 

 

 

 

 

started by a FOR operation.

 

 

 

 

 

 

 

 

 

 

LEAVESR

 

Used to exit from anywhere within a

 

 

 

 

 

subroutine.

 

 

 

 

 

 

 

 

Changes

to this Guide

Since

V4R2

 

 

 

 

 

This

V4R4

guide,ILE RPG

for

AS/400

Programmer's Guide, SC09-2507-02, differs

in many places

from

the

V4R2ILE

RPGguide,for AS/400 Programmer's Guide,

SC09-2507-01.

Most

of

the changes

are related to the enhancements that

been

made

since V3R7; others reflect minor technical corrections. To

using

this

manual,

technical changes and enhancements are noted with a

bar

().

 

 

 

 

 

 

About This Guidexxi

Page 23
Image 23
IBM manual To this Guide, Changes, Since, For AS/400, RPGguide,for AS/400 Programmers Guide

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.