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# VecNormEnd
Ends a split phase norm computation. 
## Synopsis
```
#include "petscvec.h"    
PetscErrorCode VecNormEnd(Vec x, NormType ntype, PetscReal *result)
```

## Input Parameters

- ***x -*** the first vector
- ***ntype -*** norm type, one of `NORM_1`, `NORM_2`, `NORM_MAX`, `NORM_1_AND_2`
- ***result -*** where the result will go





## Notes
Each call to `VecNormBegin()` should be paired with a call to `VecNormEnd()`.

The `x` vector is not allowed to be `NULL`, otherwise the vector would not have its correctly cached norm value


## See Also
 `VecNormBegin()`, `VecNorm()`, `VecDot()`, `VecMDot()`, `VecDotBegin()`, `VecDotEnd()`, `PetscCommSplitReductionBegin()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/utils/comb.c.html#VecNormEnd">src/vec/vec/utils/comb.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/vec/utils/comb.c)


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