:orphan:
# PetscRealView
Prints an array of doubles; useful for debugging.
## Synopsis
```
#include "petscsys.h"
PetscErrorCode PetscRealView(PetscInt N, const PetscReal idx[], PetscViewer viewer)
```
Collective
## Input Parameters
- ***N -*** number of `PetscReal` in array
- ***idx -*** array of `PetscReal`
- ***viewer -*** location to print array, `PETSC_VIEWER_STDOUT_WORLD`, `PETSC_VIEWER_STDOUT_SELF` or 0
## Note
This may be called from within the debugger
## Developer Note
idx cannot be const because may be passed to binary viewer where temporary byte swapping may be done
## See Also
`PetscViewer`, `PetscIntView()`
## Level
intermediate
## Location
src/sys/error/err.c
## Examples
src/dm/field/tutorials/ex1.c
src/mat/tutorials/ex10.c
src/ts/tutorials/ex11_sa.c
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/error/err.c)
[Index of all Sys routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)