Examples
Example 1: Close and keep:
CLOSE ( 2, STATUS='KEEP')
Example 2: Close and delete:
CLOSE ( 2, STATUS='DELETE', IOSTAT=I )
Example 3: Close and keep a scratch file even though the status is SCRATCH:
OPEN ( 2, STATUS='SCRATCH')
...
CLOSE ( 2, STATUS='KEEP', IOSTAT=I )