# SNESHasNPC
Returns whether a nonlinear preconditioner exists 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESHasNPC(SNES snes, PetscBool *has_npc)
```
Not Collective


## Input Parameter

- ***snes -*** iterative context obtained from `SNESCreate()`



## Output Parameter

- ***has_npc -*** whether the `SNES` has an NPC or not





## See Also
 `SNESSetNPC()`, `SNESGetNPC()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/interface/snes.c.html#SNESHasNPC">src/snes/interface/snes.c</A>


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