---
url: /process-functions/dimension-getid.md
description: Returns the id of a dimension.
---

# dimension.getId

Returns the id of a dimension.

```js
dimension.getId(dimensionName)
```

## Parameters

| Parameter | Type | Description |
|---|---|---|
| `dimensionName` | `string` | The dimension's name. |

## Returns

The dimension's id, or `"ERROR: Dimension not found"` when it can't be found.

## Examples

```js
const dimensionId = dimension.getId("time");
```