How do I display a decimal value to 2 decimal places

Question

When displaying the value of a decimal currently with  ToString    it s accurate to like 15 decimal places  and since I m using it to represent dollars and cents  I only want the output to be 2 decimal places    Do I use a variation of  ToString   for this

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Math Round Method  Decimal  Int32

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Mike M  s answer was perfect for me on  NET  but  NET Core doesn t have a decimal Round method at the time of writing   In  NET Core  I had to use   decimal roundedValue   Math Round rawNumber  2  MidpointRounding AwayFromZero     A hacky method  including conversion to string  is   public string FormatTo2Dp decimal myNumber           Use schoolboy rounding  not bankers      myNumber   Math Round myNumber  2  MidpointRounding AwayFromZero        return string Format   0 0 00    myNumber

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Given decimal d 12 345  the expressions d ToString  C   or String Format   0 C    d  yield  12 35 - note that the current culture s currency settings including the symbol are used   Note that  C  uses number of digits from current culture  You can always override default to force necessary precision with C Precision specifier  like String Format   0 C2    5 123d

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https   msdn microsoft com en-us library dwhawy9k 28v vs 110 29 aspx  This link explains in detail how you can handle your problem and what you can do if you want to learn more  For simplicity purposes  what you want to do is   double whateverYouWantToChange   whateverYouWantToChange ToString  F2      if you want this for a currency  you can make it easier by typing  C2  instead of  F2

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I know this is an old question  but I was surprised to see that no one seemed to post an answer that    Didn t use bankers rounding  Didn t keep the value as a decimal     This is what I would use   decimal Round yourValue  2  MidpointRounding AwayFromZero     http   msdn microsoft com en-us library 9s0xa85y aspx

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There s a very important characteristic of Decimal that isn t obvious   A Decimal  knows  how many decimal places it has based upon where it came from  The following may be unexpected   Decimal Parse  quot 25 quot   ToString              gt     quot 25 quot  Decimal Parse  quot 25  quot   ToString             gt     quot 25 quot  Decimal Parse  quot 25 0 quot   ToString            gt     quot 25 0 quot  Decimal Parse  quot 25 0000 quot   ToString         gt     quot 25 0000 quot   25m ToString                              gt     quot 25 quot  25 000m ToString                          gt     quot 25 000 quot   Doing the same operations with Double will result in zero decimal places   quot 25 quot   for all of the above examples  If you want a decimal to 2 decimal places there s a high likelyhood it s because it s currency in which case this is probably fine for 95  of the time  Decimal Parse  quot 25 0 quot   ToString  quot c quot         gt     quot  25 00 quot   Or in XAML you would use  Binding Price  StringFormat c  One case I ran into where I needed a decimal AS a decimal was when sending XML to Amazon s webservice  The service was complaining because a Decimal value  originally from SQL Server  was being sent as 25 1200 and rejected   25 12 was the expected format   All I needed to do was Decimal Round      with 2 decimal places to fix the problem regardless of the source of the value      generated code by XSD exe  StandardPrice   new OverrideCurrencyAmount             TypedValue   Decimal Round product StandardPrice  2          currency    quot USD quot      TypedValue is of type Decimal so I couldn t just do ToString  quot N2 quot   and needed to round it and keep it as a decimal

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If you just need this for display use string Format  String Format   0 0 00    123 4567m            123 46    http   www csharp-examples net string-format-double   The  m  is a decimal suffix  About the decimal suffix   http   msdn microsoft com en-us library 364x0z75 aspx

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If you need to keep only 2 decimal places  i e  cut off all the rest of decimal digits    decimal val   3 14789m  decimal result   Math Floor val   100    100     result   3 14   If you need to keep only 3 decimal places   decimal val   3 14789m  decimal result   Math Floor val   1000    1000     result   3 147

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decimalVar ToString              returns    when decimalVar    0   or  decimalVar ToString   0          returns  0   when decimalVar    0

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Here is a little Linqpad program to show different formats   void Main         FormatDecimal 2345 94742M       FormatDecimal 43M       FormatDecimal 0M       FormatDecimal 0 007M      public void FormatDecimal decimal val        Console WriteLine  ToString   0    val       Console WriteLine  c   0 c    val       Console WriteLine  0 00   0 0 00    val       Console WriteLine  0      0 0       val       Console WriteLine                             Here are the results   ToString  2345 94742 c   2 345 95 0 00  2345 95 0     2345 95                     ToString  43 c   43 00 0 00  43 00 0     43                     ToString  0 c   0 00 0 00  0 00 0     0                     ToString  0 007 c   0 01 0 00  0 01 0     0 01

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None of these did exactly what I needed  to force 2 d p  and round up as 0 005 - gt  0 01  Forcing 2 d p  requires increasing the precision by 2 d p  to ensure we have at least 2 d p    then rounding to ensure we do not have more than 2 d p   Math Round exactResult   1 00m  2  MidpointRounding AwayFromZero   6 665m ToString   - gt   6 67   6 6m ToString   - gt   6 60

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If you want it formatted with commas as well as a decimal point  but no currency symbol   such as 3 456 789 12     decimalVar ToString  n2

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You can use system globalization to format a number in any required format   For example     system globalization cultureinfo ci   new system globalization cultureinfo  en-ca      If you have a decimal d   1 2300000 and you need to trim it to 2 decimal places then it can be printed like this d Tostring  F2  ci   where F2 is string formating to 2 decimal places and ci is the locale or cultureinfo    for more info check this link http   msdn microsoft com en-us library dwhawy9k aspx

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decimalVar ToString  F      This will    Round off to 2 decimal places eg  23 456   23 46 Ensure that there are always 2 decimal places eg  23   23 00  12 5   12 50   Ideal for displaying currency   Check out the documentation on ToString  F    thanks to Jon Schneider

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Double Amount   0  string amount  amount string Format   0 F2    Decimal Parse Amount ToString

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The top-rated answer describes a method for formatting the string representation of the decimal value  and it works   However  if you actually want to change the precision saved to the actual value  you need to write something like the following   public static class PrecisionHelper       public static decimal TwoDecimalPlaces this decimal value                   These first lines eliminate all digits past two places          var timesHundred    int   value   100           var removeZeroes   timesHundred   100m              In this implementation  I don t want to alter the underlying            value   As such  if it needs greater precision to stay unaltered             I return it          if  removeZeroes    value              return value              Addition and subtraction can reliably change precision               For two decimal values A and B   A   B  will have at least as             many digits past the decimal point as A or B          return removeZeroes   0 01m - 0 01m            An example unit test    Test  public void PrecisionExampleUnitTest         decimal a   500m      decimal b   99 99m      decimal c   123 4m      decimal d   10101 1000000m      decimal e   908 7650m      Assert That a TwoDecimalPlaces   ToString CultureInfo InvariantCulture           Is EqualTo  500 00          Assert That b TwoDecimalPlaces   ToString CultureInfo InvariantCulture           Is EqualTo  99 99          Assert That c TwoDecimalPlaces   ToString CultureInfo InvariantCulture           Is EqualTo  123 40          Assert That d TwoDecimalPlaces   ToString CultureInfo InvariantCulture           Is EqualTo  10101 10             In this particular implementation  values that can t be expressed in        two decimal places are unaltered  so this remains as-is      Assert That e TwoDecimalPlaces   ToString CultureInfo InvariantCulture           Is EqualTo  908 7650

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Very rarely would you want an empty string if the value is 0   decimal test   5 00  test ToString  0 00        5 00  decimal  test2   5 05  test2 ToString  0 00        5 05  decimal  test3   0  test3 ToString  0 00        0 00    The top rated answer is incorrect and has wasted 10 minutes of  most  people s time

[c#] How do I display a decimal value to 2 decimal places?

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