# DMLabelHasStratum
Determine whether points exist with the given value 
## Synopsis
```
#include "petscdmlabel.h"   
#include "petscsection.h"   
PetscErrorCode DMLabelHasStratum(DMLabel label, PetscInt value, PetscBool *exists)
```
Not collective


## Input Parameters

- ***label -*** the DMLabel
- ***value -*** the stratum value



## Output Parameter

- ***exists -*** Flag saying whether points exist





## See Also
 `DMLabelCreate()`, `DMLabelGetValue()`, `DMLabelSetValue()`, `DMLabelClearValue()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/label/dmlabel.c.html#DMLabelHasStratum">src/dm/label/dmlabel.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/label/dmlabel.c)


[Index of all DMLabel routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
