Welcome to the board.

We just missing following example:

• based on @error status. mostly used by reading file contents
  

  code:

  ---

  
   IF (Open(1,"c:\input.txt") = 0)
     $result=ReadLine(1)
     WHILE (@error = 0)
       ? $result
       $result=ReadLine(1)
     LOOP
     IF Close(1)
     ENDIF
   ENDIF
  

  ---