如何在C＃中将2.0转换为四个精度浮点数

Question

I have the following code:

float f = 0.02;

The results are equivalent to:

f = 0.0200

How to do this in C#?

Answer 1

A floating point number has a value (for example 0.02).

When you print it, you can format it into any number of different representations, including "0.002", "0.00200" and "scientific notation". It's the same value with the same precision - it's just printed differently (perhaps with a different number of digits after the decimal).

I believe your question is about "formatting":

String s = String.Format("{0:0.0000}", 0.002);

Here is much more detail:

• http://msdn.microsoft.com/en-us/library/s8s7t687.aspx

• http://msdn.microsoft.com/en-us/library/dwhawy9k.aspx

• http://www.dotnetperls.com/string-format

Answer 2

Under the hood, the number is still the same whether the trailing zeros are shown. You can't change what the number is , but you can change how it displays by using a .ToString() overide.

Specifically the Zero custom specifier .