# MPI_Initialized

Indicates whether `MPI_Init` has been called.

## Synopsis

    #include "mpi.h"
    int MPI_Initialized( int *flag )

## Output Parameter

flag
  Flag is true if `MPI_Init` has been called and false otherwise.

## Notes for Fortran

All MPI routines in Fortran (except for `MPI_WTIME` and `MPI_WTICK`) have an additional argument `ierr` at the end of the argument list. `ierr` is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the `call` statement.

All MPI objects (e.g., `MPI_Datatype`, `MPI_Comm`) are of type `INTEGER` in Fortran.

Location:initialize.c