# PetscMPIInt
datatype used to represent 'int' parameters to MPI functions. 


## Notes
This is always a 32 bit integer, sometimes it is the same as `PetscInt`, but if PETSc was built with --with-64-bit-indices but
standard C/Fortran integers are 32 bit then this is NOT the same as `PetscInt`; it remains 32 bit.

`PetscMPIIntCast`(a,&b) checks if the given `PetscInt` a will fit in a `PetscMPIInt`, if not it
generates a `PETSC_ERR_ARG_OUTOFRANGE` error.


## See Also
 `PetscBLASInt`, `PetscInt`, `PetscMPIIntCast()`


## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscsystypes.h.html#PetscMPIInt">include/petscsystypes.h</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/classes/random/tutorials/ex2.c.html">src/sys/classes/random/tutorials/ex2.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/tutorials/ex3f90.F90.html">src/sys/tutorials/ex3f90.F90.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/ex5.c.html">src/dm/impls/plex/tutorials/ex5.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex73.c.html">src/ksp/ksp/tutorials/ex73.c.html</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/include/petscsystypes.h)


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