# PetscFormKeySort
Sorts an array of `PetscFormKey` in place in increasing order. 
## Synopsis
```
#include "petscds.h" 
PetscErrorCode PetscFormKeySort(PetscInt n, PetscFormKey arr[])
```
Not Collective


## Input Parameters

- ***n -*** number of values
- ***X -*** array of PetscFormKey





## See Also
 `PetscFormKey`, `PetscIntSortSemiOrdered()`, `PetscSortInt()`

## Level
intermediate

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


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


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