:orphan:
# TaoGetIterationNumber
Gets the number of `TaoSolve()` iterations completed at this time. 
## Synopsis
```
#include "petsctao.h" 
PetscErrorCode TaoGetIterationNumber(Tao tao, PetscInt *iter)
```
Not Collective


## Input Parameter

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



## Output Parameter

- ***iter -*** iteration number



## Notes
For example, during the computation of iteration 2 this would return 1.




## See Also
 [](ch_tao), `Tao`, `TaoGetLinearSolveIterations()`, `TaoGetResidualNorm()`, `TaoGetObjective()`

## Level
intermediate

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

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/rosenbrock2.c.html">src/tao/unconstrained/tutorials/rosenbrock2.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/rosenbrock3.c.html">src/tao/unconstrained/tutorials/rosenbrock3.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/spectraladjointassimilation.c.html">src/tao/unconstrained/tutorials/spectraladjointassimilation.c</A><BR>


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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)  
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[Index of all manual pages](/manualpages/singleindex.md)