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6.69 FLUSH — Flush I/O unit(s)

Description:
Flushes Fortran unit(s) currently open for output. Without the optional argument, all units are flushed, otherwise just the unit specified.
Standard:
GNU extension
Class:
Subroutine
Syntax:
CALL FLUSH(UNIT)
Arguments:

UNIT (Optional) The type shall be INTEGER.

Note:
Beginning with the Fortran 2003 standard, there is a FLUSH statement that should be preferred over the FLUSH intrinsic.