Looking for an easier way to use floats in C#

Question

For a number of reasons, I have to use floats in my code instead of doubles. To use a literal in my code, I have to write something like:

float f = 0.75F;

or the compiler will barf since it treats just "0.75" as a double. Is there anything I can put in my code or set in Visual Studio that will make it treat a literal like "0.75" as a float without having to append an "F" every time?

Answer 1

No - fortunately, IMO. Literals are treated the same way everywhere.

This is a good thing - imagine some maintenance developer comes and looks at your code in a year's time. He sees "0.75" and thinks "I know C# - that's a double! Hang on, how is it being assigned to a float variable?" Ick.

Is it really so painful to add the "F" everywhere? Do you really have that many constants? Could you extract them as constant values, so all your "F-suffixed" literals are in the same place.

Answer 2

The language interprets floating point precision literals as doubles everywhere. This is not a configurable feature of the compiler - and with good reason.

Configuring how the language interprets you code would lead to problems with both compatibility and the ability of maintenance developers to understand what the code means.

While not advisable generally, you can reduce the pain a little in C# 3 by using:

var f = 0.75F;

Just be careful, because forgetting the 'F' suffix with this syntax WILL cause the compiler to create a double, not a float.

Answer 3

FYI -- you can find all of the compiler options for C# at http://msdn.microsoft.com/en-us/library/6ds95cz0.aspx. If you check there, you'll see that there isn't any option that allows this -- and rightly so for the reasons that @Jon Skeet noted.

Answer 4

Float comes with an F :-)

Answer 5

I would advise you to always use

var meaning = 1f;

because the "var" keyword saves a lot of human interpretation and maintenance time.