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You can use the GeometryReader and Text modifiers to get the width of a Text component in SwiftUI. Here's an example:

struct ContentView: View {
    var body: some View {
        GeometryReader { geometry in
            Text("Hello, World!")
                .font(.largeTitle)
                .background(Color.yellow)
                .onAppear {
                    print("Width of Text component: \(geometry.size.width)")
                }
        }
    }
}

In this example, we use the GeometryReader to get the size of the containing view, which we can then use to get the width of the Text component. We add a background color to the Text component using the .background modifier to make it easier to see the component's bounds. Finally, we use the .onAppear modifier to print the width of the component when it appears on the screen.