Is there any difference between a function's parameters and its argument in c++? Or they both are same?

Answer 1

The difference is a parameter is a type used to declare the type of information the method can receive (a set of rules if you like). Where the argument is the value being passed.

Answer 2

Michael has put the words in some confusing way. I will try to explain it in my way:

int foo(int a, int b) // a and b are parameters
{
return a + b;
}

foo(5, 6); // 5 and 6 are arguments passed to function

Here it is explained aswell:
https://stackoverflow.com/questions/1788923/parameter-vs-argument

Answer 3

confusion cleared
tysm Jakub