---
title: "Substring"
slug: "substring"
updated: 2024-04-16T11:16:20Z
published: 2024-04-16T11:16:20Z
canonical: "help.mail-and-deploy.com/substring"
---

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

# Substring

### General

The Substring function can be used to extract characters from a String.

### Syntax

The syntax of the Substring function is:

          Left Function Syntax

          

Left(<value>, <first_character_index>, <length>)

The character index is zero-based (the first character has an index of 0).

### Examples

The following Expression returns a String that contains 3 characters starting from the second character of the value of variable vTest of a Datasource named Consumer Sales:

          Substring Function Example

          

Substring([Datasource].[Consumer Sales].[Variable].[vTest], 1, 3)