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# ISGetInfo
Determine whether an index set satisfies a given property 
## Synopsis
```
#include "petscis.h" 
PetscErrorCode ISGetInfo(IS is, ISInfo info, ISInfoType type, PetscBool compute, PetscBool *flg)
```
Collective or Logically Collective if the type is `IS_GLOBAL` (logically collective if the value of the property has been permanently set with `ISSetInfo()`)


## Input Parameters

- ***is -*** the index set
- ***info -*** describing a property of the index set, one of those listed in the documentation of `ISSetInfo()`
- ***compute -*** if `PETSC_FALSE`, the property will not be computed if it is not already known and the property will be assumed to be false
- ***type -*** whether the property is local (`IS_LOCAL`) or global (`IS_GLOBAL`)



## Output Parameter

- ***flg -*** whether the property is true (`PETSC_TRUE`) or false (`PETSC_FALSE`)





## Notes
`ISGetInfo()` uses cached values when possible, which will be incorrect if `ISSetInfo()` has been called with incorrect information.

To clear cached values, use `ISClearInfoCache()`.


## See Also
 `IS`, `ISInfo`, `ISInfoType`, `ISSetInfo()`, `ISClearInfoCache()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/is/interface/index.c.html#ISGetInfo">src/vec/is/is/interface/index.c</A>


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