Getting the decimal part of a double in Swift

Question

I\'m trying to separate the decimal and integer parts of a double in swift. I\'ve tried a number of approaches but they all run into the same issue...

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Answer 1

There’s a function in C’s math library, and many programming languages, Swift included, give you access to it. It’s called modf, and in Swift, it works like this

// modf returns a 2-element tuple,

// with the whole number part in the first element,

// and the fraction part in the second element

let splitPi = modf(3.141592)

splitPi.0 // 3.0

splitPi.1 // 0.141592

You can create an extension like below,

extension Double {

    func getWholeNumber() -> Double {

        return modf(self).0

    }

    func getFractionNumber() -> Double {

        return modf(self).1

    }

}