:orphan:
# TSSetExactFinalTime
Determines whether to adapt the final time step to match the exact final time, interpolate solution to the exact final time, or just return at the final time `TS` computed. 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSSetExactFinalTime(TS ts, TSExactFinalTimeOption eftopt)
```
Logically Collective


## Input Parameters

- ***ts -*** the time-step context
- ***eftopt -*** exact final time option


```none
  TS_EXACTFINALTIME_STEPOVER    - Don't do anything if final time is exceeded
  TS_EXACTFINALTIME_INTERPOLATE - Interpolate back to final time
  TS_EXACTFINALTIME_MATCHSTEP - Adapt final time step to match the final time
```



## Options Database Key

- ***-ts_exact_final_time <stepover,interpolate,matchstep> -*** select the final step at runtime





## Note
If you use the option `TS_EXACTFINALTIME_STEPOVER` the solution may be at a very different time
then the final time you selected.


## See Also
 [](ch_ts), `TS`, `TSExactFinalTimeOption`, `TSGetExactFinalTime()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/interface/ts.c.html#TSSetExactFinalTime">src/ts/interface/ts.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/burgers_spectral.c.html">src/tao/unconstrained/tutorials/burgers_spectral.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>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex1.c.html">src/ts/tutorials/ex1.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex10.c.html">src/ts/tutorials/ex10.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11.c.html">src/ts/tutorials/ex11.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex11_sa.c.html">src/ts/tutorials/ex11_sa.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex12.c.html">src/ts/tutorials/ex12.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex13.c.html">src/ts/tutorials/ex13.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex14.c.html">src/ts/tutorials/ex14.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex15.c.html">src/ts/tutorials/ex15.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex16.c.html">src/ts/tutorials/ex16.c</A><BR>


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


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