# TSComputeForcingFunction
Evaluates the forcing function. 
## Synopsis
```
#include "petscts.h"  
PetscErrorCode TSComputeForcingFunction(TS ts, PetscReal t, Vec U)
```
Collective


## Input Parameters

- ***ts -*** the `TS` context
- ***t -*** current time



## Output Parameter

- ***U -*** the function value





## See Also
 [](chapter_ts), `TS`, `TSSetSolutionFunction()`, `TSSetRHSFunction()`, `TSComputeIFunction()`

## Level
developer

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


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


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