How to convert a string to a float

Written by Paul Hudson    @twostraws

There are several ways to convert between a string and a Float, but the easiest way is to use NSString as an intermediate because that comes with several helpers built right in:

let myString = "556"
let myFloat = (myString as NSString).floatValue

Available from iOS 7.0

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This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.