:orphan:
# SNESLineSearchGetNorms
Gets the norms for for X, Y, and F. 
## Synopsis
```
#include "petscsnes.h" 
PetscErrorCode SNESLineSearchGetNorms(SNESLineSearch linesearch, PetscReal *xnorm, PetscReal *fnorm, PetscReal *ynorm)
```
Not Collective


## Input Parameter

- ***linesearch -*** linesearch context



## Output Parameters

- ***xnorm -*** The norm of the current solution
- ***fnorm -*** The norm of the current function, this is the `norm(function(X))` where `X` is the current solution.
- ***ynorm -*** The norm of the current update





## Note
Some values may not be up to date at particular points in the code.

This, in combination with `SNESLineSearchSetNorms()`, allow the line search and the `SNESSolve_XXX()` to share
computed values.


## See Also
 `SNESLineSearch`, `SNESLineSearchSetNorms()` `SNESLineSearchGetVecs()`

## Level
developer

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


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


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