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

# ETL: Length

> Return the number of characters in a string field value. Use LENGTH for measuring, validating, and filtering string data in ETL data pipelines.

## Description

Returns the number of characters in a string field.

## Syntax

`Length(string_expression)`

## Examples

`Length('69.59.196.211')` returns 13

## Return value datatype

Integer

## Impact of null value

If input is null, returns null.