What is command line argument?

Getting the arguments from command prompt in c is known as command line arguments.  In c main function has three arguments.
 
(a) Argument counter
 
(b) Argument vector
 
(c) Environment vector
 
For example:-
 
void main(int argc,char *argv[],char *env[]){
    int i;
    for(i=1;i<argc;i++){
         printf("%s\n",argv[i]);
    }
}

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