BC100_EN_Col91_FV_Part_A4.pdf

BC100

Introduction to Programming

(Based on ABAP Examples)

SAP NetWeaver Application Server - ABAP

Date

Training Center

Instructors

Education Website

Participant Handbook

Course Version: 91

Course Duration: 2 Day(s)

Material Number: 50094355

An SAP course - use it to learn, reference it for work

No part of this publication may be reproduced or transmitted in any form or for any purpose

without the express permission of SAP AG. The information contained herein may be changed

without prior notice.

Some software products marketed by SAP AG and its distributors contain proprietary software

components of other software vendors.

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g2009525115932

About This Handbook

This handbook is intended to complement the instructor-led presentation of this

course, and serve as a source of reference. It is not suitable for self-study.

Typographic Conventions

American English is the standard used in this handbook. The following

typographic conventions are also used.

Type Style

Description

Example text

Words or characters that appear on the screen. These

include field names, screen titles, pushbuttons as well

as menu names, paths, and options.

Also used for cross-references to other documentation

both internal and external.

Example text

Emphasized words or phrases in body text, titles of

graphics, and tables

EXAMPLE TEXT

Names of elements in the system. These include

report names, program names, transaction codes, table

names, and individual key words of a programming

language, when surrounded by body text, for example

SELECT and INCLUDE.

Screen output. This includes file and directory names

and their paths, messages, names of variables and

parameters, and passages of the source text of a

program.

Example text

Exact user entry. These are words and characters that

you enter in the system exactly as they appear in the

documentation.

Example text

Variable user entry. Pointed brackets indicate that you

replace these words and characters with appropriate

entries.

iii

2009

About This Handbook

BC100

Icons in Body Text

The following icons are used in this handbook.

Icon

Meaning

For more information, tips, or background

Note or further explanation of previous point

Exception or caution

Procedures

Indicates that the item is displayed in the instructor's

presentation.

2009

Contents

CourseOverview......................................................... vii

CourseGoals...........................................................vii

CourseObjectives .....................................................vii

Unit 1: From the Problem to the Program - Introduction to

Structured Programming.................................................1

From theProblem to theAlgorithm...................................2

From theAlgorithm to theProgramFlowchart .................... 13

From theAlgorithm to theStructogram ............................ 24

Unit 2: Flow of an ABAP Program ................................... 35

SystemArchitecture .................................................. 36

General ABAP Syntax. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

TheEditor.............................................................. 55

Unit 3: Introduction to ABAP Programming....................... 73

Working with Elementary Data Objects, Assignments . . . . . . . . . . . 74

Logical Expressions and Relational Operators . . . . . . . . . . . . . . . . . . . 95

Branches andCaseDistinction ..................................... 99

Working with the Debugger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Loops..................................................................122

ExitingProgramUnits ...............................................133

Unit 4: Selection Screen, List, and ProgramTerminations....145

SelectionScreen (Parameters) ....................................146

Lists....................................................................158

ProcessingCharacter Strings ......................................167

ProgramTerminations...............................................180

Unit 5: Example of Reuse Components in Subroutines . . .....193

Purpose of Reuse Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194

Unit 6: Appendix ........................................................201

Calling Subroutines and Passing Parameters . . . . . . . . . . . . . . . . . . .202

ExitingSubroutines..................................................218

Debugging Subroutines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .228

Index .......................................................................239

2009

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