Saturday, March 17, 2012

Conditional Statements

This post gives the details about conditional statements which are used in SAP-ABAP programming language, dear ABAPers for more details can refer this post.


IF.........END IF

1) IF condition1.           2) IF condition1.
     action1.                           action1.
   ELSE.                              ELSE.
     action2.                           IF condition 2.
  ENDIF.                                     action2.
                                               ENDIF.
                                               action3.
                                           ENDIF.



CASE.................END CASE

The field after case is always compared with values after when with respect to equality. You can’t express a > b etc.
syntax:

CASE field.                                             
WHEN value1.                 
          action1.                   
WHEN value2.                 
          action2.                   
WHEN OTHERS              
          action_other.
ENDCASE.

WHILE................END WHILE

1)  WHILE condition.  
                Statements. 
       ENDWHILE.
  

2) WHILE condition.  
         Statements.  
     IF condition.  
          EXIT.  
     ENDIF. 
  ENDWHILE.

DO...............END DO

1) DO n TIMES.                2) DO.
  Statements                        Statements.
  CONTINUE.                      IF condition.
  ENDDO.                                      EXIT.
                                             ENDIF.
                                            ENDDO.

Continue - stops the current steps and continues with next step in loop
Exit - stops processing loop and continues at next statement after ENDDO.

CHECK

CHECK condition.
If condition is True then execution continues
Otherwise action depends on the location where Check statement is used.
eq. in Form - control goes to Endform
 in Loop - control goes to Endloop 
in Program - execution terminated 


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