> For the complete documentation index, see [llms.txt](https://docs.appmixer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.appmixer.com/connector-configuration/utils/csv/addcolumn.md).

# Add Column

**Overview**

The **AddColumn** component allows adding a new column to an existing dataset.

**Input Parameters**

| Parameter      | Type     | Required | Description                                    |
| -------------- | -------- | -------- | ---------------------------------------------- |
| `dataset`      | `array`  | ✅        | The dataset to which the column will be added. |
| `columnName`   | `string` | ✅        | The name of the new column.                    |
| `defaultValue` | `any`    | ❌        | Default value for the new column (optional).   |

**Output Parameters**

| Parameter | Type    | Description                              |
| --------- | ------- | ---------------------------------------- |
| `dataset` | `array` | The updated dataset with the new column. |

**Instructions**

1. **Provide the Dataset:**
   * Ensure the dataset is passed in the correct array format.
2. **Specify Column Details:**
   * Enter the column name.
   * Optionally, provide a default value for all rows.
3. **Process & Output:**
   * The component adds the column and outputs the updated dataset.

***


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