petsc-3.14.5 2021-03-03
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# PetscInt

PETSc type that represents an integer, used primarily to represent size of arrays and indexing into arrays. Its size can be configured with the option --with-64-bit-indices to be either 32-bit (default) or 64-bit.

### Notes

For MPI calls that require datatypes, use MPIU_INT as the datatype for PetscInt. It will automatically work correctly regardless of the size of PetscInt.

### See Also

PetscBLASInt, PetscMPIInt, PetscReal, PetscScalar, PetscComplex, PetscInt, MPIU_REAL, MPIU_SCALAR, MPIU_COMPLEX, MPIU_INT

### Level

beginner

### Location

include/petscsystypes.h

### Examples

src/sys/classes/random/tutorials/ex1.c.html
src/sys/classes/random/tutorials/ex2.c.html
src/sys/tutorials/ex5f90.F90.html
src/vec/vec/tutorials/ex1f.F90.html
src/vec/vec/tutorials/ex3f.F.html
src/vec/vec/tutorials/ex4f90.F90.html
src/vec/vec/tutorials/ex5f.F90.html
src/vec/vec/tutorials/ex6f.F90.html
src/vec/vec/tutorials/ex11f90.F90.html
src/vec/vec/tutorials/ex12f.F90.html
src/vec/vec/tutorials/ex16f.F90.html
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages