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 — trojanfoe
– trojanfoe, Commented Jun 9, 2014 at 15:18

hallski · Accepted Answer · 2014-06-09 16:14:37Z

68

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 9, 2014 at 16:14

hallski

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1 Comment

Matthias Bauch Over a year ago

NSNumberFormatter is the way to go, because it's locale aware. Not every country uses the 12.345 format.

Richard Torcato · Accepted Answer · 2015-03-25 18:59:53Z

46

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, 2015 at 18:59

Richard Torcato

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Comments

Sebin Roy · Accepted Answer · 2017-02-04 17:31:13Z

26

In swift 3 it is simple as given below

let stringFloat =  String(describing: float)

answered Feb 4, 2017 at 17:31

Sebin Roy

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1 Comment

Zack Shapiro Over a year ago

This should be the answer

Alexander Volkov · Accepted Answer · 2019-02-16 18:53:18Z

3

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.

edited Feb 16, 2019 at 18:53

Alexander Volkov

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answered Nov 23, 2017 at 5:45

Himanshu Moradiya

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Comments

scodav · Accepted Answer · 2014-06-09 15:48:27Z

-4

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

answered Jun 9, 2014 at 15:48

scodav

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2 Comments

Kalzem Over a year ago

OP asked for Float -> String not Int -> String. The first solution you gave with String(width) does not work with Float.

Alexander Volkov Over a year ago

=)))))))))))))))))))))

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