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ABAP Keyword Documentation →  ABAP − Reference →  Calling and leaving program units →  Exiting Program Units →  Exiting Loops 

CHECK - loop

Quick Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax


CHECK log_exp.

Effect

If the statement CHECK is executed in a loop and log_exp is incorrect, the statement CHECK exits the current loop pass immediately and the program continues with the next loop pass. Any logical expression can be specified for log_exp.


Notes

  • Inside a loop, CHECK log_exp works just like the following:

IF NOT log_exp.
  CONTINUE.
ENDIF.

  • Outside a loop, the statement CHECK exits the current processing block (see CHECK), however it is best to only use CHECK inside loops.


Example

Cancels a loop pass using CHECK if the loop index sy-index is an odd number.

DATA remainder TYPE i. 
DO 20 TIMES. 
  remainder = sy-index MOD 2. 
  CHECK remainder = 0. 
  cl_demo_output=>write_text( |{ sy-index }| ). 
ENDDO. 
cl_demo_output=>display( ).