I have this code in C#
double result = 480 - 460.8;
Why result is 19.199999999999989 instead of 19.2?
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1cause its double? you need to use Math.Round() instead if you want that – Masoud Andalibi Mar 05 '17 at 07:58
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public static void Main() { double x = 480 - 460.8; } – Elham Azadfar Mar 05 '17 at 08:00
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I don't want to Round it. – Elham Azadfar Mar 05 '17 at 08:05
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Welcome to floating point issues. – Yotam Salmon Mar 05 '17 at 08:09
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2This is why C# has a `decimal` type. – Powerlord Mar 05 '17 at 08:16
1 Answers
9
you should format your double precision of the result output:
double result = 480 - 460.8;
String.Format("{0:0.##}", result);
test example:
update:
there is another way without string formatting you can use method Math.Round with two digits after decimal place :
Math.Round(result,2);
example:
Oghli
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@Elham Azadfar read this tutorial about round method for double numbers : https://www.dotnetperls.com/math-round – Oghli Mar 05 '17 at 08:54