Code:int main (int argc, char **argv) { int sum; if (argc < 3 ) return -1; else sum = argv[1] + argv[2]; printf("Sum is %c\n",sum); return 0; } If the executable name is "sum", then what would be the output of below command line execution? $ ./sum 3 4 Please explain the above code. And when we needed to pass argument to main func? And main function recieves parameters from where?