Dropdown We use the Dropdown Button to display any Dropdown List item as we can change its style according to the requirement. We can customize the dropDown widget with given properties like background color, hint, items, and many more. Let’s see some of the properties of the dropdown button for example. 1. Items We will use this property to define items displayed in the dropdown list as text values. We can define the items directly or we can define using a list. Firstly we can see how to define items directly. We are declaring one global variable and set value 1 so in the dropDown value, we can not see an empty value. and with the use of DropdownMenuItem() we can see the value of that particular item. Let's see the example of how to use items directly:- The second way is to use items property as a list of values and set that values in the Text widget. 2. Value We will use value property to set the selected it...