:orphan:
# PetscObjectPrintClassNamePrefixType
used in the `XXXView()` methods to display information about the class, name, prefix and type of an object 
## Synopsis
```
#include "petscsys.h"   
PetscErrorCode PetscObjectPrintClassNamePrefixType(PetscObject obj, PetscViewer viewer)
```

## Input Parameters

- ***obj -*** the PETSc object
- ***viewer -*** `PETSCVIEWERASCII` viewer where the information is printed, function does nothing if the viewer is not `PETSCVIEWERASCII` type





## Notes
If the viewer format is `PETSC_VIEWER_ASCII_MATLAB` then the information is printed after a % symbol
so that MATLAB will treat it as a comment.

If the viewer format is `PETSC_VIEWER_ASCII_VTK*`, `PETSC_VIEWER_ASCII_LATEX`, or
`PETSC_VIEWER_ASCII_MATRIXMARKET` then don't print header information
as these formats can't process it.


## Developer Note
The flag donotPetscObjectPrintClassNamePrefixType is useful to prevent double printing of the information when recursion is used to actually print the object.


## See Also
 `PetscObjectSetName()`, `PetscObjectName()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/objects/pname.c.html#PetscObjectPrintClassNamePrefixType">src/sys/objects/pname.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/tutorials/ex10.c.html">src/mat/tutorials/ex10.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/objects/pname.c)


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