---
schema_version: "1"
id: d854ebde602724aa824aefd0f04264d8ace9570f5e74fb12e28f76f360af361d
title: isLowerCase
collection: mulesoft
version: current
locale: en-us
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canonical_url: https://docs.mulesoft.com/dataweave/2.9/dw-strings-functions-islowercase
source_site: docs.mulesoft.com
content_type: documentation
content_hash: 80e5119b52381fd1140591d26332e25f5d5fa44cafbbfbd8d2ee4bb30a129bb6
description: MuleSoft Documentation Site
release: "2.9"
latest: false
---
---
product: DataWeave
version: 2.9
---

# 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"), // ö is lowercase Unicode
 "j": isLowerCase("mulesÖft") // Ö is uppercase Unicode
}
```

#### Output

```JSON
{
 "a": false,
 "b": false,
 "c": false,
 "d": true,
 "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._