Convert a float into a string in Swift iOS

Question

I want to convert a Float into a string.

myFloat: Float = 99.0
myString: String

How would I convert myFloat into a string so I can assign the following code

myString = myFloat

score 8 · Accepted Answer · answered Jul 28 '14 at 22:20

8

Similar to Connor's answer, you can do the following to have a little more control about how your Double or Float is dislpayed...

let myStringToTwoDecimals = String(format:"%.2f", myFloat)

This is basically like stringWithFormat in objC.

answered Jul 28 '14 at 22:20

Ethan

1

I found this because of the initializer patterns of Swift from ObjectiveC. `[NSString stringWithFormat:@"%.2f and %@", myFloat, @"I do this in my sleep"]` so I assumed that String(format:...) would be a valid initializer – Ethan Jul 29 '14 at 01:57
So, I can have a `println` with format (a little awkward) `println(String(format:"myFloat: %.2f", myFloat))`. – zaph Jul 29 '14 at 02:03
Yea dude, or you can like... accept change into your life ;) `println("full float value is \(myFloat)")` – Ethan Jul 29 '14 at 02:08
Sometimes I don't want "0.422535211267606", I just want "0.42" so I can read and comprehend the value easily. – zaph Jul 29 '14 at 02:49
You have reason. Here is another option, alternate to `println(String(format...))` specifically, David's answer is neat http://stackoverflow.com/questions/24051314/precision-string-format-specifier-in-swift – Ethan Jul 29 '14 at 03:10

score 0 · Answer 2 · answered Jul 28 '14 at 22:09

0

var myFloat: Float = 99.0
var myString: String = "\(myFloat)"

answered Jul 28 '14 at 22:09

Connor Pearson

Would there be a way then to limit the amount of numbers after the decimal place e.g `99.999` become `99.9` ? – Stephen Fox Jul 28 '14 at 22:19
yes, `var myShortString: String = String(format: "%.2f", myFloat)` – Connor Pearson Jul 28 '14 at 22:23

2 Answers2