Difference between NO and NONE
NO - it goes before a noun
NO (=not a / not any) - There is no sugar = there isn't any sugar - I have no car = I don't have a car - I have no problems = I don't have any problems
Note: NO can also be an adverb, the opposite of YES, but that's a different word and it is always used as the answer to a question: - Do you like it? - No, I don't
NONE - it goes alone
None = No + noun
- He has two cars and I have none (= no cars)
- I bought a lot of milk, but now there is none (= no milk)
- I asked many people, but none knew it (= no people)
If the noun substituted is the word "person" or "thing" we prefer the pronouns "nobody/no one" and "nothing":
- I looked through the window but I saw nobody (not a person)
- I had everything I wanted, but now I have nothing (not a thing)
tip: if you can use "nobody" or "nothing", use them and forget about "none".
- What have you got to drink? - Nothing (not a thing)
- Who went with you? - Nobody (= not a person)
- You have four children and I have none (= no children)
- How many beers have you got in the fridge? - None (= no beers, but maybe I have milk and water, etc)
- What have you got in the fridge? - Nothing (= not a thing, zero, empty)
NONE + of + determiner (the, my, this...)
We always use NONE before OF:
- None of the books is interesting
- None of my friends knows it
- None of us speaks French
NO & Nope
Any difference? Nope - not in meaning anyway.
Actually, "nope" means "no," but only in the sense of the opposite of "yes." Therefore, you might use it to answer a yes-or-no question in the negative, but you would never say, "We found nope errors during the inspection," or "There was nope way Dave would ever surrender."
That said, "nope" is informal, and should only be used in writing in the most informal of contexts.