# PCGetReusePreconditioner
Determines if the `PC` reuses the current preconditioner even if the operator in the preconditioner has changed. 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode PCGetReusePreconditioner(PC pc, PetscBool *flag)
```
Not Collective


## Input Parameter

- ***pc -*** the preconditioner context



## Output Parameter

- ***flag -*** `PETSC_TRUE` do not compute a new preconditioner, `PETSC_FALSE` do compute a new preconditioner





## See Also
 `PC`, `PCGetOperators()`, `MatZeroEntries()`, `PCSetReusePreconditioner()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/interface/precon.c.html#PCGetReusePreconditioner">src/ksp/pc/interface/precon.c</A>


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


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