What is the meaning of $\mathbb{R}\setminus\{0\}$?

Question

This is used in many posts related to functions and googling it doesn't help.
What does this mean? $\mathbb{R}$ should stand for all Real numbers.

Answer 1

Real numbers that aren't $0$. \ is set difference.

Answer 2

This refers to the set $\mathbb{R}$ , but without $0$, i.e. the complement of $\{0\}$ in $\mathbb{R}$.