Simple question

None of them!
Either
I don't know anybody here.
or
I don't know any of you.
are two possible alternatives.

I know nobody/no one here
I don't know anybody/anyone here

"I don't know everybody here" means "I know one or more of the people here, but not everbody".

Well , then what is the difference between anyone and no one and anybody ?
That's all. Thanks for help.

"Anyone" and "anybody" mean "any person". "No one" and "nobody" mean "no person". If you want to talk about an complete absence or lack of something you can either:

1. Negate a word or phrase using "any" : I don't want any cars in my garden; I don't hear anyone speaking; I did not have any money (or I had not any money). I don't see anywhere to hang my coat.

OR:

2. Use a word or phrase starting starting with "no" e.g. no one, nobody, nowhere etc. In standard formal English (to do so would produce a double negative, which, confusingly, is often found in regional or colloquial speech). I want no cars in my garden; I hear no one speaking; I had no money; I see nowhere to hang my coat.

I missed out some words:


"Anyone" and "anybody" mean "any person". "No one" and "nobody" mean "no person". If you want to talk about an complete absence or lack of something you can either:

1. Negate a word or phrase using "any" : I don't want any cars in my garden; I don't hear anyone speaking; I did not have any money (or I had not any money). I don't see anywhere to hang my coat.

OR:

2. Use a word or phrase starting starting with "no" e.g. no one, nobody, nowhere etc. In standard formal English it is not negated (to do so would produce a double negative, which, confusingly, is often found in regional or colloquial speech). I want no cars in my garden; I hear no one speaking; I had no money; I see nowhere to hang my coat.