ant-design/components/radio/index.en-US.md
Wei Zhu 77b78a9389 docs: Unify type naming (#4636)
* Unify name of ReactNode type in document

* Lowser all string type name

* Lowercase all number type name

* Lowercase all boolean type name

* Unify array type

* Lowercase all object type name

* Unify mutilple types
2017-01-20 20:10:50 +08:00

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---
category: Components
type: Data Entry
title: Radio
---
Radio.
## When To Use
- Used to select a single state in multiple options.
- The difference between Select is that Radio is visible to user and can facilitate the comparison of choice. So, when you want to use Radio, option should not be too much.
## API
### Radio
| Property | Description | Type | optional | Default |
|----------------|------------------------------------------|------------|---------|--------|
| checked | Specifies whether the radio is selected. | boolean | | false |
| defaultChecked | Specifies the initial state: whether or not the radio is selected. | boolean | | false |
| value | According to value for comparison, to determine whether the selected | any | | none |
### RadioGroup
radio groupwrap a group of `Radio`
| Property | Description | Type | optional | Default |
|----------------|----------------------------------|-------------------|--------|--------|
| onChange | The callback function that is triggered when the state changes. | Function(e:Event) | none | none |
| value | Used for setting the currently selected value. | any | none | none |
| defaultValue | Default selected value | any | none | none |
| size | Size, only on radio style | string | `large` `default` `small` | `default` |