Examples

   1.$ OPEN/READ INPUT_FILE   TEST.DAT
     $ READ_LOOP:
     $ READ/END_OF_FILE=NO_MORE  INPUT_FILE  DATA_LINE
        .
        .
        .
     $ GOTO READ_LOOP
     $ NO_MORE:
     $ CLOSE INPUT_FILE

     The OPEN command in this example opens the file TEST.DAT and
     assigns it the logical name of INPUT_FILE. The /END_OF_FILE
     qualifier on the READ command requests that, when the end-of-
     file (EOF) is reached, the command interpreter should transfer
     control to the line at the label NO_MORE. The CLOSE command
     closes the input file.

   2.$ @READFILE
<Ctrl/Y>

     $ STOP
     $ SHOW LOGICAL/PROCESS
        .
        .
        .
       "INFILE" = "_DB1"
       "OUTFILE" = "_DB1"
     $ CLOSE INFILE
     $ CLOSE OUTFILE

     In this example, pressing Ctrl/Y interrupts the execution of
     the command procedure READFILE.COM. Then, the STOP command
     stops the procedure. The SHOW LOGICAL/PROCESS command displays
     the names that currently exist in the process logical name
     table. Among the names listed are the logical names INFILE
     and OUTFILE, assigned by OPEN commands in the procedure
     READFILE.COM.

     The CLOSE commands close these files and deassign the logical
     names.