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# 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
src/sys/objects/options.c
## Examples
src/ksp/ksp/tutorials/ex21.c
src/ksp/ksp/tutorials/ex49.c
src/ksp/ksp/tutorials/ex54f.F90
src/ts/tutorials/ex27.c
src/ts/tutorials/extchem.c
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/objects/options.c)
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