How to round off the numbers in the following code

Question

3.67/5 (3 votes)

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C#

string[] final = new string[result.Length];             

                for (int splitCount = 0; splitCount < result.Length; splitCount++)
                {
                    MatchCollection match = Regex.Matches(result[splitCount], @"\d+(\.\d+)?");

                    foreach (Match m in match)
                    {
                        final[splitCount] += (Double.Parse(m.Value, new System.Globalization.NumberFormatInfo() { NumberDecimalSeparator = "." })).ToString()+"            ";
                    }
                }

How to round off the double value to 4 digits in the above code

Posted 30-Mar-14 20:06pm

KUMAR619

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3 solutions

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Matt T Heffron · Accepted Answer · 2014-03-31T08:23:00

C#

string[] final = new string[result.Length];             
for (int splitCount = 0; splitCount < result.Length; splitCount++)
{
  MatchCollection match = Regex.Matches(result[splitCount], @"\d+(?:\.\d*)?");
  final[splitCount] = string.Empty;      // Don't forget to initialize the entries in final.
  foreach (Match m in match)
  {
    final[splitCount] += Double.Parse(m.Value, System.Globalization.CultureInfo.InvariantCulture).ToString("F4")+"            ";
  }
}

Just use the format info in the .ToString() to control the precision.
I changed the regex so that it was a noncapturing group and to allow for decimal point without following digits. E.g., "1234."

Abhinav S · Accepted Answer · 2014-03-30T20:16:00

Solution 2

Use the Math.Round[^] function.

Posted 30-Mar-14 20:16pm

Abhinav S

Comments

KUMAR619 31-Mar-14 2:18am

Thanks but by task is to round number to 4 digits as shown below

13.3456788-->13.3456

23.23-->23.2300

Add 0 if has lesser digits or trim them if has more digits

Rao Lokesh · Accepted Answer · 2014-03-30T20:15:00

Solution 1

int round(double number)
{
return (number >= 0) ? (int)(number + 0.5) : (int)(number - 0.5);
}

Use Long Instead Of Int If You have A long No

And Another Way Is

double a = 2.333333;
System.Math.Round(a)
Use Math Funtion

Posted 30-Mar-14 20:15pm

Rao Lokesh

Updated 30-Mar-14 20:20pm

v2

Comments

KUMAR619 31-Mar-14 2:19am

Thanks but by task is to round number to 4 digits as shown below

13.3456788-->13.3456

23.23-->23.2300

Add 0 if has lesser digits or trim them if has more digits

Rao Lokesh 31-Mar-14 2:20am

double a = 2.333333;
System.Math.Round(a)

After This U Can Convert It Into Format You Want

Rao Lokesh 31-Mar-14 2:25am

Mark As Answer If You Get Answer