# 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 on IS 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 -*** wheter the property is true (PETSC_TRUE) or false (PETSC_FALSE)


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


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