Round double value to 2 decimal places

Question

I have a double value as 22 368511 I want to round it to 2 decimal places  i e  it should return 22 37  How can I do that

User · Answer

I use the solution posted by Umberto Raimondi  extending type Double   extension Double       func roundTo places Int  - gt  Double           let divisor   pow 10 0  Double places           return  self   divisor  rounded     divisor

User · Answer

You could do this   NSNumberFormatter  f     NSNumberFormatter alloc  init    f setNumberStyle NSNumberFormatterDecimalStyle    f setFormat  0 00        test NSNumber  a    12  NSString  s    f stringFromNumber a   NSLog        s

User · Answer

Use NSNumber  aNumber    NSNumber numberWithDouble number   instead of NSNumber  aNumber    NSNumber numberWithFloat number      NSString   roundToNearestValue  double number       NSNumber  aNumber    NSNumber numberWithDouble number        NSNumberFormatter  numberFormatter     NSNumberFormatter alloc  init        numberFormatter setNumberStyle NSNumberFormatterDecimalStyle        numberFormatter setUsesGroupingSeparator NO        numberFormatter setMaximumFractionDigits 2        numberFormatter setMinimumFractionDigits 0       NSString  string    numberFormatter stringFromNumber aNumber               return string

User · Answer

label setText   Value    2f   myNumber

User · Answer

You can use the NSDecimalRound function

User · Answer

You can use the below code to format it to two decimal places  NSNumberFormatter  formatter     NSNumberFormatter alloc  init     formatter setNumberStyle NSNumberFormatterDecimalStyle    formatter setMaximumFractionDigits 2    formatter setRoundingMode  NSNumberFormatterRoundUp    NSString  numberString    formatter stringFromNumber  NSNumber numberWithFloat 22 368511     NSLog   Result       numberString    Result 22 37   Swift 4   let formatter   NumberFormatter   formatter numberStyle    decimal formatter maximumFractionDigits   2 formatter roundingMode    up  let str   String describing  formatter string from  12 2345     print str

User · Answer

As in most languages the format is     2f   you can see more examples here     Edit  I also got this if your concerned about the display of the point in cases of 25 00        NSNumberFormatter  fmt     NSNumberFormatter alloc  init        fmt setPositiveFormat   0           NSLog         fmt stringFromNumber  NSNumber numberWithFloat 25 342         NSLog         fmt stringFromNumber  NSNumber numberWithFloat 25 3         NSLog         fmt stringFromNumber  NSNumber numberWithFloat 25 0          2010-08-22 15 04 10 614 a out 6954 903  25 34 2010-08-22 15 04 10 616 a out 6954 903  25 3 2010-08-22 15 04 10 617 a out 6954 903  25

User · Answer

For Swift there is a simple solution if you can t either import Foundation  use round   and or does not want a String  usually the case when you re in Playground    var number   31 726354765 var intNumber   Int number   1000 0  var roundedNumber   Double intNumber    1000 0   result  31 726

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To remove the decimals from your double  take a look at this output  Obj C  double hellodouble   10 025  NSLog   Your value with 2 decimals    2f   hellodouble   NSLog   Your value with no decimals    0f   hellodouble     The output will be   10 02  10   Swift 2 1 and Xcode 7 2 1  let hellodouble Double   3 14159265358979 print String format  Your value with 2 decimals    2f   hellodouble   print String format  Your value with no decimals    0f   hellodouble     The output will be   3 14  3

User · Answer

I was going to go with Jason s answer but I noticed that in My version of Xcode  4 3 3  I couldn t do that   so after a bit of research I found they had recently changed the class methods and removed all the old ones   so here s how I had to do it   NSNumberFormatter  fmt     NSNumberFormatter alloc  init     fmt setMaximumFractionDigits 2   NSLog         fmt stringFromNumber  NSNumber numberWithFloat 25 342

User · Answer

In Swift 2 0 and Xcode 7 2   let pi Double   3 14159265358979 String format    2f   pi    Example

User · Answer

value    round value 100     100 0

[iphone] Round double value to 2 decimal places

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