# PetscSectionGetFieldConstraintDof
Return the number of constrained degrees of freedom associated with a given field on a point. 
## Synopsis
```
#include "petscsection.h"   
PetscErrorCode PetscSectionGetFieldConstraintDof(PetscSection s, PetscInt point, PetscInt field, PetscInt *numDof)
```
Not Collective


## Input Parameters

- ***s -*** the `PetscSection`
- ***point -*** the point
- ***field -*** the field



## Output Parameter

- ***numDof -*** the number of dof which are fixed by constraints





## See Also
 [PetscSection](sec_petscsection), `PetscSection`, `PetscSectionGetDof()`, `PetscSectionSetFieldConstraintDof()`, `PetscSectionCreate()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/section/interface/section.c.html#PetscSectionGetFieldConstraintDof">src/vec/is/section/interface/section.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex18.c.html">src/ts/tutorials/ex18.c.html</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/section/interface/section.c)


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