# TaoGetCurrentTrustRegionRadius
Gets the current trust region radius. 
## Synopsis
```
#include "petsctao.h" 
PetscErrorCode TaoGetCurrentTrustRegionRadius(Tao tao, PetscReal *radius)
```
Not Collective


## Input Parameter

- ***tao -*** a Tao optimization solver



## Output Parameter

- ***radius -*** the trust region radius





## See Also
 `TaoSetInitialTrustRegionRadius()`, `TaoGetInitialTrustRegionRadius()`, `TAONTR`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/interface/taosolver.c.html#TaoGetCurrentTrustRegionRadius">src/tao/interface/taosolver.c</A>


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


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