When a specific ELSE action is not required, you can code a null ELSE clause in one of two ways: omit the ELSE clause entirely or just code ELSE without operands (an action). The following IF-THEN-ELSE sequence omits the ELSE entirely:

IF &PRINT=YES THEN + 
 DO
  WRITE We are printing the data set as you requested.
  printds da(&dsn)
 END

You can also code the following:

IF &PRINT=YES THEN + 
 DO
  WRITE We are printing the data set as you requested.
  printds da(&dsn)
 END
ELSE