This question already has answers here:
Closed 10 years ago.
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Leave only two decimal places after the dot
Formatting a float to 2 decimal places
If I have a float that consists of something like 153.2154879, is there any way to convert it to string but only show 4 decimal places? I know I can format it using "000.000", but the front number doesnt always have to be 3 digits. So is there a way to show all the front numbers (153), but only the first 4 characters after the point in a string?
Something like this should do:
your_number.ToString("0.####");
This will show a max of 4 decimal places.
I usually use a format string like "#0.0000".
You can use the C# function Math.Round function.
float a= 153.213456;
Math.Round(a,3);
this would round up the number to 153.213
then get convert it to string.
Related
This question already has answers here:
How do I display a decimal value to 2 decimal places?
(19 answers)
Closed 3 months ago.
I have declared some values as doubles:
double mean;
double median;
Since the mean after the calculation is a whole number, it is showing without any decimal value. But I need 2 decimal values.
eg:- if the mean is 255, I need to show it as 255.00.
How to achieve this?
What I have tried: Round(mean,2)
Still showing 255
Need 255.00
Need the same for the numbers from the data file too. Need to show the whole number as a decimal number with 2 precision.
try this:
decimal a = 255;
var result = Math.Round(a, 2).ToString("0.00");
This question already has answers here:
Why does integer division in C# return an integer and not a float?
(8 answers)
Closed 3 years ago.
I'm making a simple calculator in c# and and everything works well until I try dividing numbers that should give decimal places. How to display 2 decimal places in these cases?
I've tried putting #.## after .ToString.
{label1.Text = (divide / Convert.ToInt64(label1.Text)).ToString("#.##");}
I expect the output of 5/4 to be 1.25, but it is 1.
convert the number to float instead of int,
{label1.Text = ((float)divide / float.Parse(label1.Text)).ToString("n2");}
This question already has answers here:
Truncate Two decimal places without rounding
(24 answers)
Closed 4 years ago.
For example if I divide 1050 / 256 I get 4.1015625. I need the value of first digit after decimal point (1 in this case). I don't want to involve ToString() conversions and then parsing it into digit again.
This picture for itsme86:
This picture for Jeroen Mostert:
What about:
decimal result = 4.1015625m;
result = result - (int)result;
result = Decimal.Round(result, 1, MidpointRounding.AwayFromZero);
This can be combined into one line if needed but is more readable this way.
Math.Floor((4.1015625 - Math.Floor(4.1015625)) * 10)
I would do it this way:
First i would subtract the the number before the decimal seperator of the given number.
Then I would multiply it by 10.
Example: 4.2 - 4 = .2 * 10 = 2
NOTE: You cannot use floating point numbers for accurate mathematical operations, as some values cannot be represented properly. So always cast to/use decimal and not float/double if you need exact values like this.
This question already has answers here:
Why is floating point arithmetic in C# imprecise?
(3 answers)
decimal vs double! - Which one should I use and when? [duplicate]
(7 answers)
Closed 6 years ago.
double sth = 250 - 249.99;
Console.WriteLine(sth);
Why does this return sth like 0.009994507, instead of 0.01?
Floating point numbers (in this case doubles) cannot represent decimal values exactly. For more info, see this page here
If you need a more accurate representation, use decimal instead.
because when you print the double you print the all double value not just the first x after point digits.
you can use String.Format to print only the first 2 numbers.
double sth = 250.00d - 249.99d;
string sthString = String.Format("{0:0.00}", sth);
Console.WriteLine(sthString);
There are a lot of decimals that have infinite binary representation. What you're experiencing is exactly this case.
For more on this topic see: http://www.exploringbinary.com/why-0-point-1-does-not-exist-in-floating-point/
This question already has answers here:
Limiting double to 3 decimal places
(8 answers)
Closed 8 years ago.
I'm have a hard time trying to format a float with 4 decimal places, for example, I have the number 2.999995, I wanna get only 4 decimal places from this number, 2.9999, when I use .toString("#.####") or .toString("0.0000") it return 2.3000, I don't wanna this, I wanna 2.9999, someone can help me?
Thanks
Try This:
float floatVal = 2.999995f;
string str=floatVal.ToString();
if(str.Split('.')[1].Length > 3)
floatVal=Convert.ToSingle(str.Substring(0,str.IndexOf('.')+5));
Console.WriteLine(floatVal);
Output:
2.9999
Demo here