[Solved] Codewars – Swift Solution (Multiply Function)

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Edit: in newer versions of Swift, OP’s code works too, since return is no longer needed if there is only oneexpression in the body of a funcion/variable. Details here.

You are not doing anything with the result.

-> Double indicates that this function should return a Double. For that, you should use the return keyword:

func multiply(_ a: Double, _ b: Double) -> Double {
    return a * b
}

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solved Codewars – Swift Solution (Multiply Function)