can somebody explain me what does passing by value and Passing by reference mean in C

Question

According to me the "passing by value" would mean using the line below:-

int i = 9;

Coders usually pass int i into a method like:

method(i) Passing by reference means exactly passing its location like :

Class.method.variable

and it will give out the value. Could anybody please help me out?

Answer 1

To answer your question, “passing by value” is nothing but once the actual value has been passed to the variable into the function. Understanding the reference you mentioned, the value 9 will be passed. Similarly, “passing by reference” would state that the function is where the variable is passed and not only including the value. Once again, in the reference you provided, the value of 9 will be used which would pass an integer. Each of these add consequences which is very useful for various scenarios.