# TSPreStage
Runs the user-defined pre-stage function set using `TSSetPreStage()` 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSPreStage(TS ts, PetscReal stagetime)
```
Collective on ts


## Input Parameters

- ***ts          -*** The `TS` context obtained from `TSCreate()`
stagetime   - The absolute time of the current stage





## Note
`TSPreStage()` is typically used within time stepping implementations,
most users would not generally call this routine themselves.


## See Also
 [](chapter_ts), `TS`, `TSPostStage()`, `TSSetPreStep()`, `TSPreStep()`, `TSPostStep()`

## Level
developer

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


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[Index of all TS routines](index.md)  
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[Index of all manual pages](/docs/manualpages/singleindex.md)  
