var value = 4.3;
var max = Math.Ceiling(value);
var min = Math.Floor(value);
var ret = 0.0;
var isHalf = ((max + min) / 2 == value)
if (isHalf) //Is half or int, so, not round
ret = value;
else
ret = Math.Round(value, 0); //round
Console.WriteLine(ret);
/*
So:
4.3 -- goes to 4.0
4.7 -- goes to 5.0
4.5 -- stay igual, so 4.5
0.1 -- goes to 0.0
0.6 -- goes to 1.0
0.5 -- stay igual, so 0.5
*/

According to your description, as far as I know, as far as I know, you could use division to check if this value is a
multipleof 0.5.

Sample Code:

double a = Convert.ToDouble(TextBox1.Text);
if (a % 0.5 == 0)
{
Response.Write(a);
}
else
{
Response.Write(Math.Round(a));
}

Best Regards,

Eric Du

MSDN Community Support
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Member

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142 Posts

## Check if a decimal number is halfway from two integers c#

Jun 28, 2017 07:23 PM|xtinction84|LINK

I need to round the numbers like this:

If 1 or 1.5 or 2 or 2.5 or 3 or 3.5 or 4 or 4.5 or .... and continues....

does not round!

if for example 1.1 rounds to 1, - Math.Round(1.1, 0) = 1

if for example 1.7 rounds to 2 - Math.Round(1.7, 0) = 2

My problem is do deal with the numbers like 0.5, 1.5, 2.5 and so on....

Please help me.

Thanks

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Moderator

## Re: Check if a decimal number is halfway from two integers c#

Jun 28, 2017 07:40 PM|bbcompent1|LINK

Are you doing this in a web application or desktop/console app?

Mark as answer posts that helped you.Member

56 Points

142 Posts

## Re: Check if a decimal number is halfway from two integers c#

Jun 28, 2017 07:41 PM|xtinction84|LINK

In a web application..

All-Star

35169 Points

9928 Posts

Moderator

## Re: Check if a decimal number is halfway from two integers c#

Jun 28, 2017 07:43 PM|bbcompent1|LINK

Ok, well post the code you have and we'll try to get you unstuck,

Mark as answer posts that helped you.Member

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142 Posts

## Re: Check if a decimal number is halfway from two integers c#

Jun 28, 2017 07:44 PM|xtinction84|LINK

I m implementing a stars rating application.

So I dont want to round for numbers like 0.5 ; 1.5 ; 2.5

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## Re: Check if a decimal number is halfway from two integers c#

Jun 28, 2017 11:28 PM|mbanavige|LINK

to round to the nearest 1/2, first multiple your number by two, then round, then divide by two

Member

56 Points

142 Posts

## Re: Check if a decimal number is halfway from two integers c#

Jun 29, 2017 12:33 AM|xtinction84|LINK

No.

if 4.3 should be 4.0 or just 4

in case 4.5, should not round.

My question is, how I detect that any number (like 4.5) is half from 4 and half from 5, so,

I dont want to round!All-Star

157122 Points

13132 Posts

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Moderator

## Re: Check if a decimal number is halfway from two integers c#

Jun 29, 2017 12:42 AM|mbanavige|LINK

your above two statements contradict each other.

if 4.3 should become 4, then you just rounded down.

If you'd prefer to round down, then you could do this

4.3 becomes 4

4.5 stays 4.5

4.6 becomes 4.5

etc...

Member

56 Points

142 Posts

## Re: Check if a decimal number is halfway from two integers c#

Jun 29, 2017 12:59 AM|xtinction84|LINK

No. I think I find the solution... like this:

I dont know if there is a solution more fast.

Contributor

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2715 Posts

## Re: Check if a decimal number is halfway from two integers c#

Jun 29, 2017 06:59 AM|Eric Du|LINK

Hi xtinction84,

According to your description, as far as I know, as far as I know, you could use division to check if this value is a multiple of 0.5.

Sample Code:

Best Regards,

Eric Du

Please remember to click "Mark as Answer" the responses that resolved your issue.

If you have any compliments or complaints to MSDN Support, feel free to contact MSDNFSF@microsoft.com.