:orphan:
# TaoMonitorDefault
Default routine for monitoring progress of `TaoSolve()` 
## Synopsis
```
#include "petsctao.h" 
PetscErrorCode TaoMonitorDefault(Tao tao, void *ctx)
```
Collective


## Input Parameters

- ***tao -*** the `Tao` context
- ***ctx -*** `PetscViewer` context or `NULL`



## Options Database Key

- ***-tao_monitor -*** turn on default monitoring





## Note
This monitor prints the function value and gradient
norm at each iteration.


## See Also
 [](ch_tao), `Tao`, `TaoDefaultSMonitor()`, `TaoSetMonitor()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/interface/taosolver.c.html#TaoMonitorDefault">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](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)