This is a process control command, i.e., it will control whether to loop back to the beginning in a WHILE/ENDW loop. This is one part of a complete command structure.
|LOOP_IF lexpr||Required - If the expression resolves to .TRUE. then the program will transfer control to the appropriate WHILE line. This would be the equivalent of executing the ENDW command.|
For more information on the different structured programming commands, and the LOOP_IF command in particular, please see Structured Programming Commands.