# help

Help for functions in Command Window.

## 📝 Syntax

* help function\_name
* help('function\_name')
* txt = help('function\_name')

## 📥 Input argument

* function\_name - a string: function name

## 📤 Output argument

* txt - a string: help text

## 📄 Description

help('function\_name') displays the help text for the functionality specified.

## 💡 Example

```matlab
help sin
```

## 🔗 See also

[doc](https://nelson-9.gitbook.io/Nelson/markdown/en/help_tools/doc).

## 🕔 History

| Version | 📄 Description  |
| ------- | --------------- |
| 1.15.0  | initial version |
