FNUM (The GNU Fortran Compiler)

### 8.117 `FNUM` — File number function ¶

Synopsis:

  `RESULT = FNUM(UNIT)`

Description:

  `FNUM(UNIT)` returns the POSIX file descriptor number corresponding to the open Fortran I/O unit `UNIT`.

Class:

  Function

Arguments:

  UNIT | The type shall be `INTEGER`.

Return value:

  The return value is of type `INTEGER`

Example:

      program test_fnum
        integer :: i
        open (unit=10, status = "scratch")
        i = fnum(10)
        print *, i
        close (10)
      end program test_fnum

Standard:

  GNU extension