How the main function in C receives command line parameters

How the main (INT argc, char ** argv) function in C receives command line parameters

If the name of the main program is run.exe or run. Out, the command line will input parameters in the following way:
./Run 1 2 3 A B C

The value of argc in the main function is 7, that is, argc = 7.
The value of argv [0] is run, that is, argv [0] = "run"
The value of argv [1] is 1, that is, argv [1] = "1"
The value of argv [2] is 2, that is, argv [2] = "2"
The value of argv [3] is 3, that is, argv [3] = "3"
The value of argv [4] is a, that is, argv [4] = ""
The value of argv [5] is B, that is, argv [5] = "B"
The value of argv [6] is C, that is, argv [6] = "C"

You can use parameters as configuration items for program startup to enhance the configurability of startup parameters.