find the surface area of a cone in swift

main.swift
A = πr² + πr√(r² + h²)
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main.swift
func surfaceAreaOfCone(radius r: Double, height h: Double) -> Double {
    let π = Double.pi
    let baseArea = π * r * r
    let slantHeight = sqrt(pow(r, 2) + pow(h, 2))
    let lateralArea = π * r * slantHeight
    let surfaceArea = baseArea + lateralArea
    return surfaceArea
}
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main.swift
let radius = 3.0
let height = 4.0
let surfaceArea = surfaceAreaOfCone(radius: radius, height: height)
print("The surface area of a cone with radius \(radius) and height \(height) is \(surfaceArea).")
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main.swift
The surface area of a cone with radius 3.0 and height 4.0 is 75.39822368615503.
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