# PetscDSGetNumFields
Returns the number of fields in the `PetscDS` 
## Synopsis
```
#include "petscds.h" 
PetscErrorCode PetscDSGetNumFields(PetscDS prob, PetscInt *Nf)
```
Not collective


## Input Parameter

- ***prob -*** The PetscDS object



## Output Parameter

- ***Nf -*** The number of fields





## See Also
 `PetscDS`, `PetscDSGetSpatialDimension()`, `PetscDSCreate()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/dt/interface/dtds.c.html#PetscDSGetNumFields">src/dm/dt/interface/dtds.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/tutorials/ex26.c.html">src/snes/tutorials/ex26.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex18.c.html">src/ts/tutorials/ex18.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex53.c.html">src/ts/tutorials/ex53.c.html</A><BR>


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


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