.PROGRAM program instruction real = 1 ;assignment of desired END ;default value is okay ;Check for undefined or omitted string parameter. IF DEFINED($string) THEN ;If parameter is defined, $internal.var = $string ;use the parameter value ELSE ;Otherwise, $internal.var = "default" ;use default value END ;(Program continues...) .END Refer to the DEFINED function for more details and for testing nonreal arguments. Related Keywords CALL program instruction CALLP program instruction CALLS program instruction EXECUTE monitor command EXECUTE program instruction PRIME monitor command SSTEP monitor command XSTEP monitorcommand eV+Language Reference Guide, v2.x, 18319-000 Rev A Page 413