# PetscOptionsGetRealArray
Gets an array of double precision values for a particular option in the database.  The values must be separated with commas with no intervening spaces. 
## Synopsis
```
#include "petscsys.h"   
PetscErrorCode PetscOptionsGetRealArray(PetscOptions options, const char pre[], const char name[], PetscReal dvalue[], PetscInt *nmax, PetscBool *set)
```
Not Collective


## Input Parameters

- ***options -*** options database, use NULL for default global database
- ***pre -*** string to prepend to each name or NULL
- ***name -*** the option one is seeking



## Output Parameters

- ***dvalue -*** the double values to return
- ***nmax -*** On input maximum number of values to retrieve, on output the actual number of values retrieved
- ***set -*** `PETSC_TRUE` if found, else `PETSC_FALSE`





## See Also
 `PetscOptionsGetInt()`, `PetscOptionsHasName()`,
`PetscOptionsGetString()`, `PetscOptionsGetIntArray()`, `PetscOptionsBool()`,
`PetscOptionsName()`, `PetscOptionsBegin()`, `PetscOptionsEnd()`, `PetscOptionsHeadBegin()`,
`PetscOptionsStringArray()`, `PetscOptionsRealArray()`, `PetscOptionsScalar()`,
`PetscOptionsBoolGroupBegin()`, `PetscOptionsBoolGroup()`, `PetscOptionsBoolGroupEnd()`,
`PetscOptionsFList()`, `PetscOptionsEList()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/objects/options.c.html#PetscOptionsGetRealArray">src/sys/objects/options.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex21.c.html">src/ksp/ksp/tutorials/ex21.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex49.c.html">src/ksp/ksp/tutorials/ex49.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex54f.F90.html">src/ksp/ksp/tutorials/ex54f.F90.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex27.c.html">src/ts/tutorials/ex27.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/extchem.c.html">src/ts/tutorials/extchem.c.html</A><BR>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/objects/options.c)


[Index of all Sys routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
