Have decimal amount, want to trim to 2 decimal places if present

Question

Do you want to just "lop off the excess decimals" or do you want to round like Jon says? — Steve Danner, Jan 14 '11 at 19:29
Truncate or Round? To Truncate see: http://stackoverflow.com/questions/329957/truncate-decimal-number-not-round-off — SwDevMan81, Jan 14 '11 at 19:31

score 23 · Accepted Answer · answered Jan 14 '11 at 19:28

Have you tried using value = Decimal.Round(value, 2)?

For example:

using System;

class Test
{    
    static void Main()
    {
        decimal d = 1234.5678m;
        Console.WriteLine("Before: {0}", d); // Prints 1234.5678
        d = decimal.Round(d, 2);
        Console.WriteLine("After: {0}", d); // Prints 1234.57
    }
}

Note that this is rounding rather than just trimming (so here it's rounded up)... what exactly do you need? Chances that the Decimal struct supports whatever you need to do. Consult MSDN for more options.

Math.Round can do banker's rounding. http://msdn.microsoft.com/en-us/library/ms131275.aspx — Hamish Grubijan, Jan 15 '11 at 19:18

score 12 · Answer 2 · answered Jan 14 '11 at 19:29

12

decimal.Truncate(myDecimal * 100) / 100

This would cut away everything following the first two decimal places. For rounding see Jon's answer.

answered Jan 14 '11 at 19:29

Joey

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score 1 · Answer 3 · answered Jan 14 '11 at 21:09

1

If its just for display purposes, you can use:

Console.Out.WriteLine("Number is: {0:F2}", myDecimalNumber);

answered Jan 14 '11 at 21:09

gap

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score 1 · Answer 4 · answered Oct 15 '19 at 19:13

1

I use this: Math.Round(MyDecimalValue,2);

answered Oct 15 '19 at 19:13

Sadjad Khazaie

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Chris Shain · Answer 5 · 2011-01-14T19:56:16.107

0

This should work (EDIT: Fixed to remove rounding):

((Int32)(value * Math.Pow(10, decimalPlaces))) / (Math.Pow(10D, decimalPlaces));

edited Jan 14 '11 at 19:56

answered Jan 14 '11 at 19:30

Chris Shain

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In C# `^` is `xor`. Also, if someone uses `decimal` chances are it's a deliberate choice and they probably don't want another type (apart from that your example is way off in any case). – Joey Jan 14 '11 at 19:34
Right, sorry should be math.exp (). How is it off otherwise? – Chris Shain Jan 14 '11 at 19:40
`Int` is not a type in C# and you're doing integer division afterwards, leaving no decimal places anyway. – Joey Jan 14 '11 at 19:46

Have decimal amount, want to trim to 2 decimal places if present

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