# SNESSetFunctionType
Sets the `SNESFunctionType` of the `SNES` method. 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESSetFunctionType(SNES snes, SNESFunctionType type)
```
Logically Collective on snes


## Input Parameters

- ***snes -*** the `SNES` context
- ***type -*** the function type





## Notes
Possible values of the function type

- ***`SNES_FUNCTION_DEFAULT` -*** the default for the given `SNESType`
- ***`SNES_FUNCTION_UNPRECONDITIONED` -*** an unpreconditioned function evaluation (this is the function provided with `SNESSetFunction()`
- ***`SNES_FUNCTION_PRECONDITIONED` -*** a transformation of the function provided with `SNESSetFunction()`


Different `SNESType`s use this value in different ways


## See Also
 `SNES`, `SNESFunctionType`, `SNESGetNormSchedule()`, `SNESComputeFunction()`, `VecNorm()`, `SNESSetFunction()`, `SNESSetInitialFunction()`, `SNESNormSchedule`

## Level
developer

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