CLOSE                    Close File or Device

 CLOSE [[#] filenum [,[#] filenum]...]

    Closes one or more files or devices and terminates the association
    between a file or device and its number.

     filenum    The number under which a file was OPENed.

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      Notes:    If no filenum is supplied, all open files and devices are
                CLOSEd.

                If the device or file was OPENed for sequential output,
                CLOSE writes the final buffer to the device or file.

                CLEAR, END, NEW, RESET, and SYSTEM automatically close all
                open files and devices.