---
schema_version: "1"
id: 639bde1fff83722666faf5dadb119b31936bb3c390c98762ad20c4e692303be3
title: isLowerCase
collection: mulesoft
version: current
locale: en-us
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canonical_url: https://docs.mulesoft.com/dataweave/2.3/dw-strings-functions-islowercase
source_site: docs.mulesoft.com
content_type: documentation
content_hash: 9824920f479d239f4cd736a0c713477cf682792302e817e074caba6bafccdd2a
description: MuleSoft Documentation Site
release: "2.3"
latest: false
---
---
product: DataWeave
version: 2.3
---

# isLowerCase

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

## isLowerCase(String): Boolean

Checks if the `text` contains only lowercase characters.

_Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later._

### 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 `isNumeric` behaves with different inputs and sizes.

#### 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")
}
```

#### Output

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

## isLowerCase(Null): Boolean

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