Convert Int to String in Swift

Question

I m trying to work out how to cast an Int into a String in Swift   I figure out a workaround  using NSNumber but I d love to figure out how to do it all in Swift   let x   Int   45 let xNSNumber   x as NSNumber let xString   String   xNSNumber stringValue

User · Answer

Convert Unicode Int to String

For those who want to convert an Int to a Unicode string, you can do the following:

let myInteger: Int = 97

// convert Int to a valid UnicodeScalar
guard let myUnicodeScalar = UnicodeScalar(myInteger) else {
    return ""
}

// convert UnicodeScalar to String
let myString = String(myUnicodeScalar)

// results
print(myString) // a

Or alternatively:

let myInteger: Int = 97
if let myUnicodeScalar = UnicodeScalar(myInteger) {
    let myString = String(myUnicodeScalar)
}

User · Answer

Converting Int to String   let x   Int   42 var myString   String x    And the other way around - converting String to Int   let myString   String    42  let x  Int    myString toInt    if  x    nil           Successfully converted String to Int     Or if you re using Swift 2 or 3   let x  Int    Int myString

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iam using this simple approach  String to Int    var a   Int   var string1   String  1   a   string1 toInt     and from Int to String   var a   Int   a   1 var string1   String    string1     a

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Multiple ways to do this    var str1 String    23   var str2 String String format   d  234

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Just for completeness  you can also use   let x   10 description   or any other value that supports a description

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let a  123456888 var str   String a    OR  var str   a as  String

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A little bit about performance UI Testing Bundle on iPhone 7 real device  with iOS 14 let i   0 lt result1   String i    0 56s 5890kB lt result2    quot   i  quot    0 624s 5900kB lt result3   i description   0 758s 5890kB  import XCTest  class ConvertIntToStringTests  XCTestCase        let count   1 000 000          func measureFunction   block     - gt  Void                     let metrics   XCTMetric                  XCTClockMetric                XCTMemoryMetric                     let measureOptions   XCTMeasureOptions default         measureOptions iterationCount   5                  measure metrics  metrics  options  measureOptions                block                        func testIntToStringConstructor             var result    quot  quot                   measureFunction                            for i in 0   count                   result    String i                                          func testIntToStringInterpolation             var result    quot  quot                   measureFunction               for i in 0   count                   result     quot   i  quot                                         func testIntToStringDescription             var result    quot  quot          measureFunction               for i in 0   count                   result    i description

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Here are 4 methods   var x   34 var s   String x  var ss      x   var sss   toString x  var ssss   x description   I can imagine that some people will have an issue with ss   But if you were looking to build a string containing other content then why not

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If you like swift extension  you can add following code  extension Int       var string String           get               return String self                      then  you can get string by the method you just added  var x   1234 var s   x string

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In Swift 3 0   var value  Int   10 var string   String describing  value

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for whatever reason the accepted answer did not work for me  I went with this approach   var myInt Int   10 var myString String   toString myInt

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in swift 3 0 this is how we can convert Int to String and String to Int    convert Integer to String in Swift 3 0  let theIntegerValue  Int   123     this can be var also let theStringValue  String   String theIntegerValue      convert String to Integere in Swift 3 0   let stringValue   String    123  let integerValue   Int   Int stringValue

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To save yourself time and hassle in the future you can make an Int extension   Typically I create a shared code file where I put extensions  enums  and other fun stuff   Here is what the extension code looks like   extension Int       func toString   - gt  String               var myString   String self          return myString           Then later when you want to convert an int to a string you can just do something like   var myNumber   0 var myNumberAsString   myNumber toString

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exampleLabel text   String yourInt

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I prefer using String Interpolation  let x   45 let string      x     Each object has some string representation  This makes things simpler  For example if you need to create some String with multiple values  You can also do any math in it or use some conditions  let text      count    count  gt  1    items     item   in the cart  Sum     sum   shippingPrice

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Swift 2   var num1   4 var numString    56  var sum2   String num1    numString var sum3   Int numString

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Swift 4   let x Int   45 let str String   String describing  x    Developer Apple com   String   init describing       The String describing   initializer is the preferred way to convert an instance of any type to a string     Custom String Convertible

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let intAsString   45 description         45  let stringAsInt   Int  45               45

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To convert String into Int  var numberA   Int  10    Print numberA     It will print 10   To covert Int into String  var numberA   10   1st way   print  numberA is   numberA       It will print 10   2nd way   var strSomeNumber   String numberA    or   var strSomeNumber      numberA

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let Str    12  let num  Int   0 num   Int  str

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In swift 3 0  you may change integer to string as given below   let a String   String stringInterpolationSegment  15    Another way is  let number  Int   15 let  numberInStringFormate  String   String number      or any integer number in place of 15

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Swift 4   Trying to show the value in label without Optional   word   here x is a Int value using   let str String   String x    0

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Check the Below Answer   let x   Int   45 var stringValue      x   print stringValue

[string] Convert Int to String in Swift

Convert Unicode Int to String

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