Checking Selection Criteria 

Use the following logical expression to check whether the contents of a field satisfy the criteria in a selection table:

... <f> IN <seltab> ....

For further information about selection criteria and how to use them, refer to Selection Screens.

DATA WA TYPE SPFLI.

SELECT-OPTIONS S_CARRID FOR WA-CARRID.

IF 'LH' IN S_CARRID.
  WRITE 'LH was selected'.
ENDIF.

The logical expression in the IF statement is true if the user entered a selection on the selection screen containing the value ‘LH’.