ABAP stands for - Advanced Business Application Programming.It is a programming language for developing applications for the SAP R/3 system.
The latest version of ABAP is called ABAP Objects and supports object-oriented programming. SAP will run applications written using ABAP/4, the earlier ABAP version, as well as applications using ABAP Objects.
Without further adieu , lets dive into ABAP.
Note, this tutorial will not go into extensive details on ABAP language constructs (which become very boring to read ) but quickly introduce key concepts to get you started so you can focus your attention on more important topics.
Syntax to declare a variable in ABAP -
DATA Variable_Name Type Variable_Type
DATA employee_number Type I.
The following is a list of Data Types supported by ABAP
|Data Type||Initial field length||Valid field length||Initial value||Meaning|
|I||4||4||0||Integer (whole number)|
|F||8||8||0||Floating point number|
|P||8||1 - 16||0||Packed number|
|C||1||1 - 65535||' ... '||Text field(alphanumeric characters)|
|D||8||8||'00000000'||Date field(Format: YYYYMMDD)|
|N||1||1 - 65535||'0 ... 0'||Numeric text field(numeric characters)|
|T||6||6||'000000'||Time field(format: HHMMSS)|
|X||1||1 - 65535||X'0 ... 0'||Hexadecimal field|
Processing Data - Assigning Values
a=16. move 16 to a. write a to b.
- Arithmetic Operations
compute a = a*100.
Following control statements can be used - - If ... EndIf Loop
if [not] exp [ and / or [not] exp ]. ........ [elseif exp. .......] [else. .......] Endif.
- Case statement
Case variable. when value1. ......... when value2. ......... [ when others. .........] Endcase. Do.
While <logical expression>. ..... ..... Endwhile.
- Do loop
Do <n> times. ..... ..... Enddo.
A list of logical operators
- GE or >=
- GT or >
- LE or <=
- LT or <
- EQ or =
- NE or <>
Finally , here is where you will spent most of your time as a developer creating / modifying programs. Transaction SE38