---
title: "Merge String List by Line step"
slug: "merge-string-by-line-step"
description: "Combine two String Lists into a single list by merging corresponding items with a specified separator."
updated: 2026-06-26T14:04:35Z
published: 2026-06-26T14:04:35Z
canonical: "documentation.decisions.com/merge-string-by-line-step"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.decisions.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Merge String List by Line step

## Overview

The **Merge String List by Line** step combines two String Lists. Each item in one list is merged with an item in the second list at the same position and is separated by a specified separator character. The step can be found under the **Data > Text** category in the step toolbox.![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1778790940697.png)

---

## Properties

| Property | Description | Data Type |
| --- | --- | --- |
| **Inputs** |
|  | List One | First list of Strings to be merged. | List of String |
|  | List Two | Second list of Strings to be merged. | List of String |
|  | Separator | Specifies the separator character. | String |
| **Outputs** |
|  | Outputs | Combined list of strings | List of String |

---

## Example

1. [Create a new Flow.](/version-10/docs/create-flows)
2. In the step toolbox, expand **Data > Text** category
3. Add the **Merge String Lists by Line** step into the workspace.
4. Define the inputs for the two lists. This example uses two **Constant** lists.
5. Define the separator value![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1778790990032.png)
6. Debug and run the Flow. The output will display the list values combined into a single list.![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1778791035906.png)