# PetscWeakFormGetNumFields
Returns the number of fields in a `PetscWeakForm` 
## Synopsis
```
#include "petscds.h" 
PetscErrorCode PetscWeakFormGetNumFields(PetscWeakForm wf, PetscInt *Nf)
```
Not collective


## Input Parameter

- ***wf -*** The `PetscWeakForm` object



## Output Parameter

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





## See Also
 `PetscWeakForm`, `PetscWeakFormSetNumFields()`, `PetscWeakFormCreate()`

## Level
beginner

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


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