---
schema_version: "1"
id: e40964be016183654af7ff717aa796d8d012943eb5a22c2c326e0091a824db1c
title: isLowerCase
collection: mulesoft
version: current
locale: en-us
portal_url: https://docs.salesforce.com/mulesoft/current/en-us/dataweave/2.11/dw-strings-functions-islowercase.md
canonical_url: https://docs.mulesoft.com/dataweave/2.11/dw-strings-functions-islowercase
source_site: docs.mulesoft.com
content_type: documentation
content_hash: c508dba08ac5b28692e0146afcf502e2cad89fdedf9c7470f7b1b7ffe93c5ee3
description: MuleSoft Documentation Site
release: "2.11"
latest: false
---
---
product: DataWeave
version: 2.11
---

# isLowerCase

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

## isLowerCase(text: String): Boolean

Checks if the `text` contains only lowercase Unicode characters.

_Introduced in DataWeave version 2.2.0._

### Parameters

<table><colgroup><col> <col></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td><p><code>text</code></p></td><td><p>The input string.</p></td></tr></tbody></table>

### Example

This example shows how `isLowerCase` behaves with different inputs, including Unicode characters
outside the ASCII range.

#### Source

```DataWeave
%dw 2.0
import isLowerCase from dw::core::Strings
output application/json
---
{
  "a": isLowerCase(null),
  "b": isLowerCase(""),
  "c": isLowerCase("  "),
  "d": isLowerCase("abc"),
  "e": isLowerCase("aBC"),
  "f": isLowerCase("a c"),
  "g": isLowerCase("a1c"),
  "h": isLowerCase("a/c"),
  "i": isLowerCase("mulesöft"),
  "j": isLowerCase("mulesÖft")
}
```

#### Output

```JSON
{
  "a": false,
  "b": false,
  "c": false,
  "d": false,
  "e": false,
  "f": false,
  "g": false,
  "h": false,
  "i": true,
  "j": false
}
```

## isLowerCase(text: Null): Boolean

Helper function that enables `isLowerCase` to work with a `null` value.

_Introduced in DataWeave version 2.2.0._