:orphan:
# DMGetDimension
Return the topological dimension of the `DM`
## Synopsis
```
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMGetDimension(DM dm, PetscInt *dim)
```
Not Collective
## Input Parameter
- ***dm -*** The `DM`
## Output Parameter
- ***dim -*** The topological dimension
## See Also
[](ch_dmbase), `DM`, `DMSetDimension()`, `DMCreate()`
## Level
beginner
## Location
src/dm/interface/dm.c
## Examples
src/dm/field/tutorials/ex1.c
src/dm/impls/plex/tutorials/ex1.c
src/dm/impls/plex/tutorials/ex10.c
src/dm/impls/plex/tutorials/ex14.c
src/dm/impls/plex/tutorials/ex1f90.F90
src/dm/impls/plex/tutorials/ex6.c
src/dm/impls/plex/tutorials/ex8.c
src/dm/impls/stag/tutorials/ex4.c
src/dm/impls/stag/tutorials/ex8.c
src/dm/impls/swarm/tutorials/ex1.c
src/dm/impls/swarm/tutorials/ex1f90.F90
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/interface/dm.c)
[Index of all DM routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)