# KSPGetResidualNorm

Gets the last (approximate preconditioned) residual norm that has been computed.

### Synopsis

    #include "petscksp.h"
    PetscErrorCode PETSCKSP_DLLEXPORT KSPGetResidualNorm(KSP ksp,PetscReal *rnorm)

Not Collective

### Input Parameters

ksp -the iterative context

### Output Parameters

rnorm -residual norm

### Keywords

KSP, get, residual norm

### See Also

KSPBuildResidual()

Level:intermediate
Location:src/ksp/ksp/interface/iterativ.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages