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## Re: How to read an integer from the minibuffer

 From: Emanuel Berg Subject: Re: How to read an integer from the minibuffer Date: Fri, 12 Nov 2021 22:14:27 +0100 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

Jean Louis wrote:

> Should I say "actual number"?

It depends:

complex    C = ... -3 + 2i, 0, 1 + 3i ...
composite      4, 6, 8, 9, 10, 12 ...
integers   Z = ... -3, -2, -1, 0, 1, 2, 3 ...
irrational F = ... \pi, \sqrt{2}, 0.121221222 ...
natural    N = 1, 2, 3, 4 ...
prime      P = 2, 3, 5, 7, 11, 13, 17 ...
rational   Q = -\frac{1}{2}, 0.33333 ... \frac{5}{2}, \frac{11}{10} ...
real       R = ... -3, -1, 0, \frac{1}{5}, 1.1, \sqrt{2}, 2, 3, \pi ...
whole      W = 0, 1, 2, 3, 4 ...

https://davenport.libguides.com/math-skills-overview/basic-operations/sets

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