How Button & function work in swiftUI

import SwiftUI struct ContentView: View { @State private var name = "" var body: some View { VStack{ Button("click me",role: .destructive, action: Clicked).buttonStyle(.borderedProminent).tint(.green).foregroundColor(.black) Text("Hello \(name)") } } func Clicked(){ name = "Saurabh" } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } }