# SNESGetFunctionNorm
Gets the last computed norm of the residual 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESGetFunctionNorm(SNES snes, PetscReal *norm)
```
Not Collective


## Input Parameter

- ***snes -*** the `SNES` context



## Output Parameter

- ***norm -*** the last computed residual norm





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

## Level
developer

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


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


[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)  
