Convert numbers to and from strings in Swift

Convert numbers to and from strings in Swift // To convert a number to a string var costString = String(9.99) // To convert a string to an Int var wholeNumber = Int("27") // To convert a string to an Float let lessPrecisePI = Float("3.14") // To convert a string to an Double let morePrecisePI = Double("3.1415926536")

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