What is $ operator

[MarkoA]

I was looking at this question: https://ask.libreoffice.org/en/question/45524/how-to-drag-copy-a-formula-to-the-same-row-and-modify-only-the-row-parameter-and-vice-versa/

It says: I know the $ operator, but google isn’t aware of it.

[mikekaganski]

It’s the absolute reference modifier.

[MarkoA]

Thanks, I can’t upvote cause I don’t have 5 points. Also this seems clearer explanation: Tutorial: Absolute, relative and mixed references