:ref:`MPI_Initialized` |mdash| Checks whether MPI has been initialized
#include <mpi.h>
int MPI_Initialized(int *flag)
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_INITIALIZED(FLAG, IERROR)
LOGICAL FLAG
INTEGER IERROR
USE mpi_f08
MPI_Initialized(flag, ierror)
LOGICAL, INTENT(OUT) :: flag
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
flag
: True if MPI has been initialized, and false otherwise (logical).ierror
: Fortran only: Error status (integer).
This routine may be used to determine whether MPI has been initialized. It is one of a small number of routines that may be called before MPI is initialized and after MPI has been finalized (:ref:`MPI_Finalized` is another).
.. seealso::
* :ref:`MPI_Init`
* :ref:`MPI_Init_thread`
* :ref:`MPI_Finalize`
* :ref:`MPI_Finalized`