1. We use few with plural nouns, and little with singular (uncountable) nouns.
- Few politicians are really honest.
- I have little interest in politics
2. There is a difference between a few and few, and between a little and little.
Few and little are rather negative: they mean ‘not much/many’.
A few and a little are more positive, their meaning is more like ‘some’.
- His ideas are very difficult, and few people understand them.
(=not many people, hardly any people)
- His ideas are difficult, but a few people understand them.
(=some people- better than nothing)
- I need little water
- Give the roses a little water every day.
3. Few and little (without a) are rather formal. In conversation, we prefer not many, not much, only a few or only a little.
- Only a few people speak a foreign language perfectly.
- Come on! We haven‘t got much time!