How do you pronounce $\mathbb{R}^2, \dots, \mathbb{R}^n$

Question

I've been starting some vector calculus and I keep pronouncing it "R squared" in my head, which is clearly wrong. What is a better way to pronounce it, so that I can state things like $f: \mathbb{R} \rightarrow \mathbb{R}^2$ out loud?

Answer 1

Actually, "$\mathbb{R}$-squared" is fine.

To see this, imagine you have a set $X$ with $n \in \mathbb{N}$ elements. How many elements does $X^2$ have? You guessed it, it has $n^2$ elements.