**PETSc version 3.17.4**

# PetscMPIInt

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

### Notes

usually this 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

include/petscsystypes.h
### Examples

src/sys/classes/random/tutorials/ex2.c.html

src/sys/tutorials/ex3f90.F90.html

src/dm/impls/plex/tutorials/ex5.c.html

src/ksp/ksp/tutorials/ex73.c.html

Index of all Sys routines

Table of Contents for all manual pages

Index of all manual pages