Both didn't go.
Is it a correct sentence?
Actually, I have read that both is not usually used in a negative clause. Use a clause with neither instead.
English Language Learners Stack Exchange is a question and answer site for speakers of other languages learning English. It only takes a minute to sign up.Sign up to join this community
You don't usually use "both" in the negative. Instead, you should use neither such as "Neither of them went". I don't mean that " Both of them didn't go" is not correct. What I mean is that the use of neither is more common than and preferable to the use of both" in this negative sentence. See the last paragraph of the link.