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

# UPPER

> The UPPER function converts lowercase letters in text to uppercase. It is supported in multiple YiDA scenarios, such as forms and workflow design. Learn its format, attributes, and return value type, and try it out with examples.

The **UPPER** function converts lowercase letters in text to uppercase.

## Supported Product Scenarios

The UPPER function is supported in the following YiDA scenarios:

* Form (main table fields)
* Form (business association rules)
* Form (validation)
* Workflow design (validation rules)
* Workflow design (association actions)
* Integration and automation
* Workflow node
* Connector

## Format

```text theme={"theme":{"light":"github-light","dark":"github-dark"}}
UPPER(text)
```

## Attribute Description

| **Attribute** | **Required** | **Description**              |
| ------------- | ------------ | ---------------------------- |
| text          | Yes          | The text content to convert. |

## Return Value

| **Return value type** | **Description**             |
| --------------------- | --------------------------- |
| Text                  | The converted text content. |

## Example

The formula in the image below returns `YIDA低代码`.

## Try It Out

Convert the lowercase letters in the **Single-line text** component to uppercase.