# [[C++]] We can pass data into a function when calling it - In the function call -> ***arguments*** - In the function definition -> ***parameters*** Must match in number, order, and type ```c void say_hello(std::string name) { cout << "Hello " << name << endl; } // compiler converts C-style string to C++ string say_hello("Frank"); ``` [[Pass by Value]]l) [[Formal and Actual Parameters]]