the beginner tut. tells me some defintions and reasons of some stuff inside the codeBut i was wondering what the std in namespace has to do w/ anything. i left it out and tried to compile it, but i got an error i didn't understand. so could someone tell me what the std is actually for and why it's needed? and maybe the difference between adding the codeCode:#include <iostream> using namespace std; int main() { cout<<"Hello,World!\n"; cin.get(); }and not adding it? thanks!Code:return 1