Remove decimal point from a decimal number

Question

I am trying to remove just the decimal point from a decimal number in C#.

For example:

My decimal number is 2353.61 I want 235361 as the result.
My decimal number is 196.06 I want 19606 as the result.

How can I do that?

multiply by 100...Will it always be two decimal places? – Benjamin Trent Jul 21 '14 at 18:57 — Benjamin Trent, Jul 21 '14 at 18:57

score 7 · Answer 1 · edited May 02 '20 at 08:25

7

I would simply get the number of decimals and multiply it by the correct power of 10. Probably not really a concern but this also would be faster and use less memory then casting it to a string splitting / recombining it, then casting it back to a double. This also works for any number of decimal places.

decimal d = 2353.61M;
int count = BitConverter.GetBytes(decimal.GetBits(d)[3])[2];
d *= Convert.ToDecimal(Math.Pow(10, count));

Using this answer to get the number of decimals.

edited May 02 '20 at 08:25

Chadfire

5
1
3

answered Jul 21 '14 at 19:01

ClassicThunder

1,896
16
25

1

FYI, 10 ^ count isn't what you think it is. Use Math.Pow instead. http://msdn.microsoft.com/en-us/library/zkacc7k1.aspx – Amir Popovich Jul 21 '14 at 19:16

score 2 · Answer 2 · answered Jul 21 '14 at 18:58

If you always want the printed value to include 2 digits for consistency, you can just multiple by 100 and truncate the result.

value = Math.Truncate(value * 100m);

This would provide the value you specified in both cases, but also provide a similar result for 2353.6 (-> 235360).

score 1 · Answer 3 · answered Jul 21 '14 at 18:58

1

Maybe something like this(if the dot is in an unknown place - otherwise it's a simple multipication):

string str = decNum.ToString().Replace(".",string.Empty);
decimal dec = decimal.Parse(str);

answered Jul 21 '14 at 18:58

Amir Popovich

29,350
9
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99

This solution is not culture-aware. – VMAtm Jan 12 '16 at 12:29

score 1 · Answer 4 · edited May 02 '20 at 04:28

1

Multiply it by ten? You could also use Math.Round(). That will round the number to it's nearest one.

edited May 02 '20 at 04:28

Dale K

25,246
15
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answered Jul 21 '14 at 18:59

2

multiplying by 10 will only move the decimal one place, it will have to be 100 for two places :) – Benjamin Trent Jul 21 '14 at 19:01

score 0 · Answer 5 · answered Jul 21 '14 at 19:54

Here it is:

    public decimal RemoveDecimalPoints(decimal d)
    {
        try
        {
            return d * Convert.ToDecimal(Math.Pow(10, (double)BitConverter.GetBytes(decimal.GetBits(d)[3])[2]));
        }
        catch (OverflowException up)
        {
            // unable to convert double to decimal
            throw up; // haha
        }
    }

score 0 · Answer 6 · answered Jul 04 '16 at 16:32

A simple solution would be:

while((int)n != n) n *= 10;

Multiplying the number by 10 moves the decimal point 1 place to the right. You need to repeat this multiplication until there are no more numbers on the right side. To detect if there are more numbers on the right, you simply cast it to int, which drops the decimal part.

score 0 · Answer 7 · edited May 02 '20 at 04:27

0

Here I have taken decimal value as 1.09, then we take the first index of value with first or default, then you can get value without decimals and without round off.

var dec = 1.09;
var op1 = Convert.ToDecimal(dec.ToString().Split('.').FirstOrDefault());

edited May 02 '20 at 04:27

Dale K

25,246
15
42
71

answered Oct 24 '19 at 10:54

Kiran290

1
1

score 0 · Answer 8 · answered Jun 08 '23 at 12:18

This will get you the value. Works in all cases, including negatives.

public int RemoveDecimalPoints(
    decimal value)
{
    var array = value.ToString().Split('.');
    var isPoint = array.Length == 2;
    var dec = array.FirstOrDefault() + (isPoint ? array.LastOrDefault() : "");
    return int.Parse(dec);
}

Remove decimal point from a decimal number

8 Answers8

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