:orphan:
# DMGetNumLabels
Return the number of labels defined by on the `DM`
## Synopsis
```
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMGetNumLabels(DM dm, PetscInt *numLabels)
```
Not Collective
## Input Parameter
- ***dm -*** The `DM` object
## Output Parameter
- ***numLabels -*** the number of Labels
## See Also
[](ch_dmbase), `DM`, `DMLabel`, `DMGetLabelByNum()`, `DMGetLabelName()`, `DMGetLabelValue()`, `DMSetLabelValue()`, `DMGetStratumIS()`
## Level
intermediate
## Location
src/dm/interface/dm.c
## Examples
src/dm/label/tutorials/ex1.c
src/dm/label/tutorials/ex1f90.F90
src/ts/tutorials/ex11_sa.c
---
[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)