SwiftUI uses State and Binding to control how your views work and display information.
State: The Data Box
Stores Changing Information: Your State box holds information that might change, like the current score in a game, the state of a toggle switch, or text entered by the user.
Magic Update: Whenever the data in a State box changes, SwiftUI knows and automatically updates the parts of your screen that depend on that information.
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@State var selectedAge: Double = 100
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Binding: The Magic Pipeline
Connects Data and Views: Binding is like a magic pipeline connecting a State box (your data) to a view (like a text field, toggle, or slider).
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