Call by reference, value, and name

Question

I\'m trying to understand the conceptual difference between call by reference, value, and name.

So I have the following pseudocode:

foo(a, b, c)
{
           


        

Answer 1

Call by Value : normal way... values of actual parameters are copied to formal parameters.

Call by Reference : instead of the parameters, their addresses are passed and formal parameters are pointing to the actual parameters.

Call by Name : like macros, the whole function definition replaces the function call and formal parameters are just another name for the actual parameters.