Exponentiation operator in Swift

Question

I don\'t see an exponentiation operator defined in the base arithmetic operators in the Swift language reference.

Is there really no predefined integer or float ex

Answer 1

I did it like so:

operator infix ** { associativity left precedence 200 }

func ** (base: Double, power: Double) -> Double {
    return exp(log(base) * power)
}

Answer 2

There isn't an operator but you can use the pow function like this:

return pow(num, power)

If you want to, you could also make an operator call the pow function like this:

infix operator ** { associativity left precedence 170 }

func ** (num: Double, power: Double) -> Double{
    return pow(num, power)
}

2.0**2.0 //4.0

Answer 3

Like most of the C-family of languages, there isn't one.