:orphan:
# SNESGetUpdateNorm
Gets the last computed norm of the solution update 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESGetUpdateNorm(SNES snes, PetscReal *ynorm)
```
Not Collective


## Input Parameter

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



## Output Parameter

- ***ynorm -*** the last computed update norm





## Note
The new solution is the current solution plus the update, so this norm is an indication of the size of the update


## See Also
 [](ch_snes), `SNES`, `SNESSetNormSchedule()`, `SNESComputeFunction()`, `SNESGetFunctionNorm()`

## Level
developer

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


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