> For the complete documentation index, see [llms.txt](https://docs.kognitos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kognitos.com/legacy/legacy-experience/automation-areas/text/removal/remove-text-using-regex.md).

# Remove Text Using Regex

## Overview

This operation lets you clean a text by removing all or specific occurrences of a regular expression pattern. You can optionally define the strategy to either remove the first occurrence, the last occurrence, or all occurrences of the matched pattern in the text.

## Syntax

This operation supports both of the following syntaxes:

#### Option 1

This syntax defines **the text** as data.

```
the text is "{input}"
the regular expression is "{regex}"
remove the regular expression from the text
 the remove strategy is "{strategy}"
```

#### Option 2

```
the regular expression is "{regex}"
remove the regular expression from "{input}"
 the remove strategy is "{strategy}"
```

> **Note:** Specifying a remove strategy is optional. By default, all matching occurrences are removed.

## Data

The table below lists the names of the data elements in this operation and indicates which can be renamed in the syntax.

| Data Name              | Can be Renamed |
| ---------------------- | -------------- |
| the text               | Yes            |
| the regular expression | No             |
| the remove strategy    | No             |

## Parameters

**Parameters** are placeholders for data. Refer to the table below for details on each parameter in this operation. In the syntax, replace parameters with your own values.

<table data-header-hidden><thead><tr><th width="140.07421875">Parameter</th><th width="227.63671875">Description</th><th width="243.33203125">Examples</th><th>Required</th></tr></thead><tbody><tr><td><code>input</code></td><td>The text to be cleaned.</td><td>The order number is 12345.</td><td>Yes</td></tr><tr><td><code>regex</code></td><td>The regular expression pattern to be removed.</td><td>[0-9]+</td><td>Yes</td></tr><tr><td><code>strategy</code></td><td><p>The removal strategy. Accepted Values:</p><ul><li><strong>first</strong> - Removes the first occurrence.</li><li><strong>last</strong> - Removes the last occurrence.</li><li><strong>all</strong> - Removes all occurrences. <em>(default)</em></li></ul></td><td>all</td><td>Optional</td></tr></tbody></table>

## Examples

### 1. No removal strategy specified

In this example, no removal strategy is specified, so all matching occurrences are removed by default.

{% tabs %}
{% tab title="Automation" %}

```
the regular expression is "[0-9]+"
remove the regular expression from "The order number is 12345."
```

{% endtab %}

{% tab title="Results" %}

```
The order number is .
```

{% endtab %}
{% endtabs %}

### 2. Removing the first occurrence

{% tabs %}
{% tab title="Automation" %}

```
the text is "The order number is 12345, and the reference ID is 67890."
the regular expression is "[0-9]+"
remove the regular expression from the text
  the remove strategy is "first"
```

{% endtab %}

{% tab title="Results" %}

```
The order number is , and the reference ID is 67890.
```

{% endtab %}
{% endtabs %}

### 3. Removing the last occurrence

{% tabs %}
{% tab title="Automation" %}

```
the text is "The order number is 12345, and the reference ID is 67890."
the regular expression is "[0-9]+"
remove the regular expression from the text
  the remove strategy is "last"
```

{% endtab %}

{% tab title="Results" %}

```
The order number is 12345, and the reference ID is .
```

{% endtab %}
{% endtabs %}


---

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