Explain the difference between VStack, HStack, and ZStack.

beginner

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These are fundamental layout containers in SwiftUI:
VStack: Arranges views vertically (top to bottom)
HStack: Arranges views horizontally (left to right)
ZStack: Layers views on top of each other (back to front)

VStack {           // Vertical stack
    Text("Top")
    Text("Bottom")
}
HStack {           // Horizontal stack
    Text("Left")
    Text("Right")
}
ZStack {           // Layered stack
    Circle().fill(Color.blue)
    Text("Overlay")
}

Each can take alignment and spacing parameters to control layout behavior.

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