# Fill null values

The fill null values step allows to fill null values in specified columns with a value of your choice.

### Step parameters

* `Replace null values in..` **column(array)\***: the columns where the null values will be filled with another value
* `With` **value\***: the value that will replace null values

### Example

**Input**

<figure><img src="https://1809014303-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZxYYf1KpgarKMgMsDCrw%2Fuploads%2Fgit-blob-d9983e126e71c4dc27261936de5936dd13690046%2Ffillna.png?alt=media" alt=""><figcaption><p>Column header - fill null values input</p></figcaption></figure>

**Configuration**

```json
{
    "columns": ["Value", "KPI"],
    "value": "NaN"
}
```

**Output**

<figure><img src="https://1809014303-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZxYYf1KpgarKMgMsDCrw%2Fuploads%2Fgit-blob-e76751edc6c2c3d16dee99fad94f7b3fcee35852%2FfillNullValues_result.png?alt=media" alt=""><figcaption><p>Column header - fill null values output</p></figcaption></figure>