# VecAppendOptionsPrefix
Appends to the prefix used for searching for all Vec options in the database. 
## Synopsis
```
#include "petscvec.h"   
PetscErrorCode VecAppendOptionsPrefix(Vec v, const char prefix[])
```
Logically Collective on Vec


## Input Parameters

- ***v -*** the Vec context
- ***prefix -*** the prefix to prepend to all option names



## Notes
A hyphen (-) must NOT be given at the beginning of the prefix name.
The first character of all runtime options is AUTOMATICALLY the hyphen.




## See Also
 `VecGetOptionsPrefix()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/interface/vector.c.html#VecAppendOptionsPrefix">src/vec/vec/interface/vector.c</A>


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


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