What means the f in 0.0f ?

Unity Engine
1

Can someone tell me for what is the f in 0.0f ?

For example:

// Disable screen dimming
Screen.sleepTimeout = 0.0f;

And are there some other letters used with numbers?

Thanks!

2

It’s explicitly casting it as a floating point number, as opposed to an int

3

Indeed the ‘f’ indicates that you want a float. If you write a fractional number without the suffix, you get a double-precision number by default, which you don’t want. So you just always use the suffix.

0 is an int
0f is a float
0.0 is a double
0.0f is a float

4

Aah, didn’t realise 0.0 was cast as a double, live and learn

5

Thank you very much for your answers!

I dont understand what you mean with “double”?
What is the difference between double and float?

6

A double uses double the bits of a float (64 vs 32 bit) and is therefor slower to calculate but in return is generally much more precise and covers a larger range of numbers.

http://msdn.microsoft.com/en-us/library/b1e65aza(v=vs.71).aspx

http://msdn.microsoft.com/en-us/library/678hzkk9(v=vs.71).aspx