Should we generally use float literals for floats instead of the simpler double literals?

Question

In C++ _{(or maybe only our compilers VC8 and VC10)} 3.14 is a double literal and 3.14f is a float literal.

Now I have a colleague

Answer 1

I personally tend to use the f postfix notation as a matter of principles and to make it obvious as much as I can that this is a float type rather than a double.

My two cents