Tutorial Decisions in SAP ABAP

Tutorial Decisions in SAP ABAP
The Decision making structure has one or more conditions to be evaluated or tested by the program, accompanied by statements or statements to be executed, if conditions are determined to be correct, and optionally, other statements to be executed,

Following are the general forms of decision structure used in most programming languages:

The ABAP programming language provides the following types of decision-making statements:

No	Statement & Description
1	IF Statement IF statements consist of logical expressions followed by one or several statements.
2	IF.. Else Statement IF statements can be followed by optional ELSE statements that execute when the expression is false.
3	Nested IF Statement You can use one IF or ELSEIF statement in another IF or ELSEIF statement..
4	CASE Control Statement CASE is used when we need to compare two or more fields or variables.

Baca Juga: Tutorial Dasar SAP ABAP

IF Statement

Syntax

 
IF<condition_1>.
  
<Statements...>.
ENDIF

Contoh:

?

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Report YH_SEP_15.  Data Title_1(20) TYPE C. Title_1 = 'Tutorials'.  IF Title_1 = 'Tutorials'.  write 'This is IF statement'.  ENDIF.

Outpunya adalah

This is IF statement

IF.. Else Statement

Syntax

IF<condition_1>.  
   <statement block 1>.  
ELSE.   
   <statement block 2>.  
ENDIF.

Contoh:

?

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Report YH_SEP_15.     Data Title_1(20) TYPE C.       Title_1 = 'Tutorials'.    IF Title_1 = 'Tutorial'.     write 'This is IF Statement'.  ELSE.     write 'This is ELSE Statement'.     ENDIF.

Outpunya adalah

This is ELSE Statement.

Nested IF Statement

Syntax

IF<condition_1>. 
<statement block>.  
IF<condition_2>. 
<statement block>.  
ELSE. 
<statement block>.  
ENDIF. 
ELSE <statement block>.  
ENDIF.

Example:

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Report YH_SEP_15.    Data: Title_1(10) TYPE C,       Title_2(15) TYPE C,       Title_3(10) TYPE C.      Title_1 = 'ABAP'. Title_2 = 'Programming'. Title_3 = 'Tutorial'.     IF Title_1 = 'ABAP'.     IF Title_2 = 'Programming'.     IF Title_3 = 'Tutorial'.        Write 'Yes, It’s Correct'. ELSE.  Write 'Sorry, It’s Wrong'.    ENDIF.       ENDIF.  ENDIF.

Outpunya adalah

Yes, It’s Correct.

CASE Control Statement

Syntax

CASE <field>. 
 
WHEN <abc>. 
   <statement block>.
   
WHEN <def>. 
   <tatement block>.
   
WHEN <pqr>. 
   <statement block>. 
...... 
...... 
......  
WHEN <xyz>. 
   <statement block>. 
  
WHEN OTHERS. 
   <statement block>.  
ENDCASE.

Example:

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eport YH_SEP_15.     Data: Title_1(10) TYPE C,     Title_2(15) TYPE C.     Title_1 = 'ABAP'. Title_2 = 'Programming'.    CASE Title_2.     WHEN 'ABAP'.    Write 'This is not the title'.     WHEN 'Tutorials'.    Write 'This is not the title'.     WHEN 'Limited'.    Write 'This is not the title'.    WHEN 'Programming'.    Write 'Yes, this is the title'.    WHEN OTHERS.    Write 'Sorry, Mismatch'.     ENDCASE.

The output is

Yes, this is the title.

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