swift - Could not find an overload for '^' that accepts the supplied arguments

Question

func squareArea(side:Double) -> Double {
    return side ^ 2
}

I get the error:

could not find an overload for '^' that accepts the supplied arguments

I've also tried

func squareArea(side:Double) -> Double {
    return Double(side ^ 2)
}

and

func squareArea(side:Double) -> Double {
    return side ^ Double(2)
}

but

func squareArea(side:Double) -> Double {
    return side * side
}

works fine. What is the correct syntax?

Answer 1

There's a function for that:

func squareArea(side:Double) -> Double {
    return pow(side, 2)
}