In this lesson I want to address reserved words. 
In C++ as is the case in lots of other languages, 
there are words that are reserved.
We call them reserved words or keywords. You 
cannot use them for other purposes other than 
what they are meant to be used for.
You've seen them. cout, cin, main, float, int, all 
the types, long, double, string, etc. You can't 
name a variable with that as an identifier.
Here is a list of some auto, const, double, float, 
int, short, struct, unsigned, break, continue, 
else, for, long, singed, switch, etc.
It seems like a rather long list but actually it's 
not.
In any case, you cannot use those. For example 
you can't say int new; or float main; or string 
cout; that certainly would not compile.
So, you might wanna familiarize yourself with 
that list.
I don't say that you need to memorize it, some 
of them I don't even know.
But be careful when you start to name a variable 
something you might want to think, but is it 
possible that this could be a reserved word?
One thing you should keep in mind all the 
reserved words are all lowercase. 
So if you think maybe that your variable name is 
a reserved words, you can always change one of 
the letters to upper case.
and really that's all there is to this lesson.
