---
schema_version: "1"
id: 029c280c3d160b5d3a75a7c463bd0b6054792b9e02319e0fe517e5ca61477d35
title: isStringType
collection: mulesoft
version: current
locale: en-us
portal_url: https://docs.salesforce.com/mulesoft/current/en-us/dataweave/2.9/dw-types-functions-isstringtype.md
canonical_url: https://docs.mulesoft.com/dataweave/2.9/dw-types-functions-isstringtype
source_site: docs.mulesoft.com
content_type: documentation
content_hash: b9a1b23669ab2082a2abcf5ba0ee2b986c43fb08961c43056b67d6c9991d49c7
description: MuleSoft Documentation Site
release: "2.9"
latest: false
---
---
product: DataWeave
version: 2.9
---

# isStringType

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

## isStringType(t: Type): Boolean

Returns `true` if the input is the String type.

_Introduced in DataWeave version 2.3.0._

### Parameters

<table><colgroup><col> <col></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td><p><code>t</code></p></td><td><p>The type to check.</p></td></tr></tbody></table>

### Example

This example shows how `isStringType` behaves with different inputs.

#### Source

```DataWeave
%dw 2.0
import * from dw::core::Types
type AString = String
output application/json
---
{
   a: isStringType(AString),
   b: isStringType(String),
   c: isStringType(Boolean),
}
```

#### Output

```Json
{
  "a": true,
  "b": true,
  "c": false
}
```