Thread: Curiosity question...

I really just started getting into programming again, as a major hobby and have been curious of a few things most about function arguments.
if I have the following

Code:

bool CreateNewString(std::string);
bool CreateNewInt(int);
bool CreateNewChar(char);
bool CreateNewFloat(float);

from what I understand those prototypes will make copies of the arguments, but if I do this

Code:

bool CreateNewString(const std::string&);
bool CreateNewInt(const int&);
bool CreateNewChar(const char&);
bool CreateNewFloat(const float&);

These will not create copies every time I run the function correct? so therefor using this along with inline should increase the speed of frequently used functions?
I understand that this is a relatively stupid thing to ask but curiosity kills. Thank you for any assistance.

Code:

bool CreateNewInt(const int&);
bool CreateNewChar(const char&);
bool CreateNewFloat(const float&);

For primitives it makes no difference (and pointer types too. I dunno if pointers are primitives)