What will be the result of this SwiftUI code when the button is tapped?

What will be the result of this SwiftUI code when the button is tapped?

struct ContentView: View {
  @State private var showFull = false
  var body: some View {
    Button("Open") {
      showFull = true
    }
    .fullScreenCover(isPresented: $showFull) {
      Text("Full Screen")
    }
  }
}