ABAP Language Introduction

ABAP stands for Advanced Business Application Programming. It is a programming language developed by SAP.

ABAP language syntax

• ABAP is not case sensitive.
• Every statement begins with a keyword and ends with a period.( WRITE is the keyword to print on screen )

  WRITE 'Hello World!'.

• Chained statements.If consecutive statements have identical part at the beginning, then ABAP allows you to chain these statements into a single statement. First write the identical part once and then place a colon (:). Then write the remaining parts of the individual statements separated by commas.Normal Statements:

  WRITE 'Hello'.
  WRITE 'ABAP'.

  Chained Statement:

  WRITE: 'Hello', 'ABAP'.

Comments:- 

They are two types of comments in abap 

1. full line comments ( are  specified by * at first column in a row).

2.inline comments  ( are  specified by " after . or , at the  end of any statement).

used for: documentation of the  program within the  program.
purpose:-
          1. easy understanding of entire program ,
          2.future enhancements( or) modifications  can be easily done.

• If you want to make the entire line as comment, then enter asterisk (*) at the beginning of the line.

  * This is a comment line 

  If you want to make a part of the line as comment, then enter double quote (“) before the comment.

  WRITE 'COMMENT'.   "Start of comment