I've written plenty of code that uses arrays. Looped over them, indexed into them, passed them around. But if you stopped me and asked what an array actually is — not the syntax, not the API, the thing itself — I wouldn't have had a good answer.
Source: [Dev.to](https://dev.to/m__mdy__m/what-is-an-array-really-im-writing-a-book-to-find-out-pf1)