> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/string-functions/middle.md).

# Middle

Kalipso - Form - Expressions - Functions - Functions Descriptions - String Functions - Middle

This Function returns a *\<string>*, which is a substring of the specified **Source string**, starting at the **Starting position**, with the specified Length.

### Parameters

* **Source string** *\<string> -* String from where to extract a substring.
* **Starting position** *\<string> -* Starting position in the **Source string** of the string to extract.
* **Length** *\<numeric> -* Length of the substring to extract.

### Examples

* *Example 1*

Mid("Enjoy Kalipso.", 7, 7)\
**Result** = Kalipso

* *Example 2*

Mid("Enjoy Kalipso.", 0, 5)\
**Result** = Enjoy

* *Example 3*

Mid("Enjoy Kalipso.", 15, 2)\
**Result** =

* *Example 4*

Mid("Enjoy Kalipso.", 7, 10)\
**Result** = Kalipso.

{% hint style="info" %}
If you specify a **Starting position** higher than the length of the specified **Source string**, and empty string will be returned.
{% endhint %}

{% hint style="info" %}
If you specify a Length higher than the difference between the length of the specified **Source string** and the specified **Starting position**, the returned string will be the left part of the **Source string**, starting at **Starting position**.
{% endhint %}