Meaning of variable declaration

[Zedd]

I am a beginner in C/C++. I have used this declaration several times :
<data type> <variable name> = value.
For example:

float angle = 0.0;

But I recently encountered this:

  float angle = 0.0f

What is the meaning of 'f' after 0.0?

[Putler]

f is a suffix that is used to specify the type of a literal.

http://www.cplusplus.com/doc/tutorial/constants/

[Zedd]

Thanks a lot