# Could we have predefined macros for naturals, integers, reals, and the like? [duplicate]

Request in title. Could we have site-wide predefined $$\LaTeX$$ macros \N, \Z, \Q and \R for $$\mathbb{N}$$, $$\mathbb{Z}$$, $$\mathbb{Q}$$, and $$\mathbb{R}$$, respectively? Any short variant would also do, like \NN, or \bN, or what have you.

I think that dozens of thousands of keystrokes would be saved by this.

Is it that there are such macros and I didn't figure them out?