Remove trailing zeros

Question

I have some fields returned by a collection as  2 4200 2 0044 2 0000   I want results like  2 42 2 0044 2   I tried with String Format  but it returns 2 0000 and setting it to N0 rounds the other values as well

User · Answer

This will work   decimal source   2 4200m  string output     double source  ToString      Or if your initial value is string   string source    2 4200   string output   double Parse source  ToString      Pay attention to this comment

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Is it not as simple as this  if the input IS a string  You can use one of these   string Format   0 G29    decimal Parse  2 0044     decimal Parse  2 0044   ToString  G29    2 0m ToString  G29     This should work for all input   Update Check out the Standard Numeric Formats I ve had to explicitly set the precision specifier to 29 as the docs clearly state      However  if the number is a Decimal and the precision specifier is omitted  fixed-point notation is always used and trailing zeros are preserved   Update Konrad pointed out in the comments      Watch out for values like 0 000001  G29 format will present them in the shortest possible way so it will switch to the exponential notation  string Format   0 G29    decimal Parse  0 00000001  System Globalization CultureInfo GetCultureInfo  en-US     will give  1E-08  as the result

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I found an elegant solution from http   dobrzanski net 2009 05 14 c-decimaltostring-and-how-to-get-rid-of-trailing-zeros   Basically   decimal v 2 4200M   v ToString                 Will return 2 42  The number of   is how many decimal digits you support

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The following code could be used to not use the string type   int decimalResult   789 500 while  decimalResult gt 0  amp  amp  decimalResult   10    0        decimalResult   decimalResult   10    return decimalResult    Returns 789 5

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try this code   string value    100   value   value Contains        value TrimStart  0   TrimEnd  0   TrimEnd        value TrimStart  0

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Trying to do more friendly solution of DecimalToString  https   stackoverflow com a 34486763 3852139    private static decimal Trim this decimal value        var s   value ToString CultureInfo InvariantCulture       return s Contains CultureInfo InvariantCulture NumberFormat NumberDecimalSeparator            Decimal Parse s TrimEnd  0    CultureInfo InvariantCulture            value     private static decimal  Trim this decimal  value        return value HasValue    decimal   value Value Trim     null     private static void Main string   args        Console WriteLine    gt  0    1 0000m Trim         Console WriteLine    gt  0    1 000000023000m Trim         Console WriteLine    gt  0      decimal   1 000000023000m  Trim         Console WriteLine    gt  0      decimal   null  Trim         Output     gt 1   gt 1 000000023   gt 1 000000023   gt

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I use this code to avoid  G29  scientific notation   public static string DecimalToString this decimal dec        string strdec   dec ToString CultureInfo InvariantCulture       return strdec Contains        strdec TrimEnd  0   TrimEnd        strdec      EDIT  using system CultureInfo NumberFormat NumberDecimalSeparator    public static string DecimalToString this decimal dec        string sep   CultureInfo CurrentCulture NumberFormat NumberDecimalSeparator      string strdec   dec ToString CultureInfo CurrentCulture       return strdec Contains sep    strdec TrimEnd  0   TrimEnd sep ToCharArray      strdec

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This is simple   decimal decNumber   Convert ToDecimal value           return decNumber ToString  0           Tested   Cheers

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try  like this   string s    2 4200    s   s TrimStart  0   TrimEnd  0           and then convert that to float

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You can just set as   decimal decNumber   23 45600000m  Console WriteLine decNumber ToString  0

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I ran into the same problem but in a case where I do not have control of the output to string  which was taken care of by a library  After looking into details in the implementation of the Decimal type  see http   msdn microsoft com en-us library system decimal getbits aspx   I came up with a neat trick  here as an extension method    public static decimal Normalize this decimal value        return value 1 000000000000000000000000000000000m      The exponent part of the decimal is reduced to just what is needed  Calling ToString   on the output decimal will write the number without any trailing 0  E g   1 200m Normalize   ToString

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Depends on what your number represents and how you want to manage the values  is it a currency  do you need rounding or truncation  do you need this rounding only for display   If for display consider formatting the numbers are x ToString      http   msdn microsoft com en-us library dwhawy9k aspx and  http   msdn microsoft com en-us library 0c899ak8 aspx  If it is just rounding  use Math Round overload that requires a MidPointRounding overload   http   msdn microsoft com en-us library ms131274 aspx   If you get your value from a database consider casting instead of conversion  double value    decimal myRecord  columnName

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In case you want to keep decimal number  try following example   number   Math Floor number   100000000    100000000

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Use the hash     symbol to only display trailing 0 s when necessary  See the tests below   decimal num1   13 1534545765  decimal num2   49 100145  decimal num3   30 000235   num1 ToString  0               13 15  num2 ToString  0               49 1  num3 ToString  0               30

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how about this  public static string TrimEnd this decimal d                string str   d ToString            if  str IndexOf  quot   quot    gt  0                        str   System Text RegularExpressions Regex Replace str Trim     quot 0    quot    quot   quot                str   System Text RegularExpressions Regex Replace str Trim     quot      quot    quot   quot                      return str

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In my opinion its safer to use Custom Numeric Format Strings   decimal d   0 00000000000010000000000m  string custom   d ToString  0                                 gives  0 0000000000001 string general   d ToString  G29       gives  1E-13

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Very simple answer is to use TrimEnd    Here is the result   double value   1 00  string output   value ToString   TrimEnd  0      Output is 1 If my value is 1 01 then my output will be 1 01

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A very low level approach  but I belive this would be the most performant way by only using fast integer calculations  and no slow string parsing and culture sensitive methods    public static decimal Normalize this decimal d        int   bits   decimal GetBits d        int sign   bits 3   amp   1  lt  lt  31       int exp    bits 3   gt  gt  16   amp  0x1f       uint a    uint bits 2      Top bits     uint b    uint bits 1      Middle bits     uint c    uint bits 0      Bottom bits      while  exp  gt  0  amp  amp    a   5    6    b   5    6   c    10    0                uint r          a   DivideBy10  uint 0  a  out r           b   DivideBy10 r  b  out r           c   DivideBy10 r  c  out r           exp--             bits 0     int c      bits 1     int b      bits 2     int a      bits 3     exp  lt  lt  16    sign      return new decimal bits      private static uint DivideBy10 uint highBits  uint lowBits  out uint remainder        ulong total   highBits      total  lt  lt   32      total   total    ulong lowBits       remainder    uint  total   10L       return  uint  total   10L

[c#] Remove trailing zeros

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