The Radio field creates one or more circle boxes on your form, only one of which can be checked.
Demo
Adding a Radio Field
To learn how to add, edit, clone, move, resize, offset, or delete a radio field, please click here.
Field Settings
To edit the settings for this field type, click the settings icon on the field itself. Click the Save & Close or Save button to save your changes. If you do not want to save your changes, you can click the Cancel button or click any other form element to close the field settings sidebar.