How to make condition in twig "not equal"?

Question

Twig

I did not find an answer to this question on the net.
Or rather, there are some answers like "not" or "not in", by the way, I also don't understand why "in".
But !== 'string or number' doesn't work.

Answer 1

show the code and what data is coming into it.
Twig calmly compares by != , just like puff itself.