PETSc version 3.17.4
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# ISBlockGetIndicesF90

Accesses the elements of an index set from Fortran90. The users should call ISBlockRestoreIndicesF90() after having looked at the indices. The user should NOT change the indices.

### Synopsis

    ISBlockGetIndicesF90(IS x,{integer, pointer :: xx_v(:)},integer ierr)

Not collective

### Input Parameter

| x | - index set

### Output Parameters

| xx_v | - the Fortran90 pointer to the array
| ierr | - error code Example of Usage:

        PetscInt, pointer xx_v(:)
        ....
        call ISBlockGetIndicesF90(x,xx_v,ierr)
        a = xx_v(3)
        call ISBlockRestoreIndicesF90(x,xx_v,ierr)

### See Also

ISBlockRestoreIndicesF90(), ISGetIndices(), ISRestoreIndices(),
ISRestoreIndices()

### Level

intermediate

### Location

src/vec/is/is/interface/index.c

### Examples

src/vec/is/is/tutorials/ex3f90.F90.html
Index of all IS routines
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