Vex Quick Question

[Sepu]

Hey Guys Im just starting to learn VEX. And right now I was watching a tutorial but the guy with a very simple sintax 

H was doing the following.

float myAttr = @Cd.b-@Cd.r;

@cd = set(myAttr,myAttr,myAttr);

Which I thought is the same as saying 

f@myAttr = @Cd.b-@Cd.r;

 

where he is declaring a variable call myAttr. I thought that you can also define variable this way f@myVar, so to make this short what is the difference between saying the 

float myAttr and f@myAttr

Hopefully Im making sense.

Thanks

[Skybar]

float myAttr creates a variable. f@myAttr creates an attribute on your geometry.

[Sepu]

Great thank you for explaining!