Can you explain what the @State annotation means in the context of SwiftUI?

In SwiftUI, the @State annotation is used to declare local state within a view. It is a property that SwiftUI monitors, and when it changes, it automatically redraws the corresponding interface.

For example, if you have a button that changes text when pressed, you can store the text in @State:

struct ContentView: View {
    @State private var count = 0

    var body: some View {
        VStack {
            Text("Pressed \(count) times")
            Button("Press me") {
                count += 1
            }
        }
    }
}

Thus, @State allows you to store mutable data inside a view and automatically update the UI when it changes.