> ## 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.

# PINYINHEADCHAR

> The PINYINHEADCHAR function returns the first letter of each character in a string, concatenated in uppercase. It supports multiple scenarios such as forms and workflow design.

The **PINYINHEADCHAR** function returns the first letter of each character in a string, concatenated in uppercase.

<Note>
  Extracting the first letters of English sentences is not yet supported. If the input contains letters, they are converted to uppercase and returned.
</Note>

## Supported Product Scenarios

The PINYINHEADCHAR function can be used in the following YiDA scenarios:

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

## Format

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

## Attribute Description

| **Attribute** | **Required** | **Description**                                           |
| ------------- | ------------ | --------------------------------------------------------- |
| text          | Yes          | The text from which to extract uppercase initial letters. |

## Return Value

| **Return type** | **Description**                            |
| --------------- | ------------------------------------------ |
| Text            | The uppercase initial letters of the text. |

## Example

The formula in the figure below returns `YDDDM`.

## Try It Out

Returns the uppercase initial letters of Chinese characters, and converts lowercase English letters to uppercase.