# TaoGetObjective
Gets the function evaluation routine for the function to be minimized 
## Synopsis
```
#include "petsctao.h" 
PetscErrorCode TaoGetObjective(Tao tao, PetscErrorCode (**func)(Tao, Vec, PetscReal *, void *), void **ctx)
```
Not collective


## Input Parameter

- ***tao -*** the Tao context


Output Parameters

- ***func -*** the objective function
- ***ctx -*** the user-defined context for private data for the function evaluation



## Calling sequence of func
```none
func (Tao tao, Vec x, PetscReal *f, void *ctx);
```


- ***x -*** input vector
- ***f -*** function value
- ***ctx -*** [optional] user-defined function context





## See Also
 `Tao`, `TaoSetGradient()`, `TaoSetHessian()`, `TaoSetObjective()`

## Level
beginner

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


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