This question may be silly.
C standard:(referred to here as argc and argv, though any names may be used, as they are local to the function in which they are declared)
What has the localness to the main function of the variables argc and argv got to do with changing their names? — I know that their names can be changed — I didn't understand the statement in the standard with respect to the localness of the variables. Please help me.
"Localness" means that thing that happen inside the scope of "whatever" don't affect the rest of the world. As far as the names of function parameters go, those names are not exposed to outside of the function. What is exposed (to varying degrees depending on implementation and system standards) are the function signatures (aka prototypes).
The term "localness" is not specific to main. Every function has a local scope. So does main. And its parameters of type int and (char*)[] are not visibly by name to the outside world.