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# ISBlockGetIndices

Gets the indices associated with each block in an `ISBLOCK`

## Synopsis

    #include "petscis.h"
    PetscErrorCode ISBlockGetIndices(IS is, const PetscInt *idx[])

Not Collective

## Input Parameter

- is - the index set

## Output Parameter

- idx - the integer indices, one for each block and count of block not indices

## Note

Call `ISBlockRestoreIndices()` when you no longer need access to the indices

## See Also

Low-level Vector Communication, `IS`, `ISBLOCK`, `ISGetIndices()`, `ISBlockRestoreIndices()`, `ISBlockSetIndices()`, `ISCreateBlock()`

## Level

intermediate

## Location

src/vec/is/is/impls/block/block.c

## Examples

src/vec/is/is/tutorials/ex3.c

## Implementations

ISBlockGetIndices_Block() in src/vec/is/is/impls/block/block.c

Index of all IS routines
Table of Contents for all manual pages
Index of all manual pages