Converting a string to a number is simple thanks to Swift. The following code will take the number 42 and convert it to an int, float and double.

        let number = 42
        
        let int = Int(number)
        let float = Float(number)
        let double = Double(number)
        
        print(int)
        print(float)
        print(double)

It will then print the results to the console which are:

42
42.0
42.0