Convert float value to String in Swift

Question

I want to convert -33.861382,151.210316,226.76 to String. I tried to type cast it but was unscucessful. How to convert float value to String ?

possible duplicate of [Precision String Format Specifier In Swift](http://stackoverflow.com/questions/24051314/precision-string-format-specifier-in-swift) — trojanfoe, Jun 09 '14 at 15:18
possible duplicate of [String formatting of a Double](http://stackoverflow.com/questions/24047374/string-formatting-of-a-double) — Jukka Suomela, Jun 12 '14 at 21:52

score 67 · Accepted Answer · answered Jun 09 '14 at 16:14

67

If you want some more control of how it's converted you can either use +stringWithFormat on NSString or NSNumberFormatter

let f = -33.861382
let s = NSString(format: "%.2f", f)

let nf = NSNumberFormatter()
nf.numberStyle = .DecimalStyle
// Configure the number formatter to your liking
let s2 = nf.stringFromNumber(f)

answered Jun 09 '14 at 16:14

hallski

123,625
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NSNumberFormatter is the way to go, because it's locale aware. Not every country uses the 12.345 format. – Matthias Bauch Mar 25 '15 at 19:05

score 44 · Answer 2 · answered Mar 25 '15 at 18:59

44

Using Xcode 6.3 you can convert a float to a string using .description

var float = -33.861382
var string = "my float is " + float.description

or you could let swift do it for you using:

var string = "my float is \(float)"

answered Mar 25 '15 at 18:59

Richard Torcato

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score 25 · Answer 3 · answered Feb 04 '17 at 17:31

25

In swift 3 it is simple as given below

let stringFloat =  String(describing: float)

answered Feb 04 '17 at 17:31

Sebin Roy

834
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This should be the answer – Zack Shapiro Jan 27 '20 at 23:34

score 3 · Answer 4 · edited Feb 16 '19 at 18:53

Here is the simple example in Swift 3.0 for convert your NSNumber into String with decimal using NumberFormatter and if you want to know more about formatter then link here

let num = NSNumber(value: 8.800000000000001)
let formatter : NumberFormatter = NumberFormatter()
formatter.numberStyle = .decimal
let str = formatter.string(from: num)!
print(str)

Output :

8.8

Any query according to my code then put comment.

score -4 · Answer 5 · answered Jun 09 '14 at 15:48

Directly from page 6 of the swift programming reference available from developer.apple.com:

Values are never implicitly converted to another type. If you need to convert a value to a different type, explicitly make an instance of the desired type.

let label = "The width is "
let width = 94
let widthLabel = label + String(width)

Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks. https://itun.es/us/jEUH0.l

OR

There’s an even simpler way to include values in strings: Write the value in parentheses, and write a backslash () before the parentheses. For example:

let apples = 3
let oranges = 5
let appleSummary = "I have \(apples) apples."
let fruitSummary = "I have \(apples + oranges) pieces of fruit."

Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks. https://itun.es/us/jEUH0.l

OP asked for Float -> String not Int -> String. The first solution you gave with `String(width)` does not work with Float. — Kalzem, Nov 24 '14 at 14:11

Convert float value to String in Swift

5 Answers5

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