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Lowercase n is usually used for integers whereas x is used for Real numbers and z for Complex numbers. But it's not set in stone. Any other letter could be used.
In this way, what does an n mean in math?
R = real numbers includes all real number [-inf, inf] Q= rational numbers ( numbers written as ratio) N = Natural numbers (all positive integers starting from 1. ( 1,2,3.inf)
Just so, what does '!' Mean in math?
It almost always means "and," both in and outside of mathematics. * This symbol is called an asterisk. In mathematics, we sometimes use it to mean multiplication, particularly with computers. For example, 5*3 = 5 times 3 = 15. () The open (or left) and close (or right) parenthesis.
N or n is used as an abbreviation for words beginning with N or n, such as 'north', ' northern', or 'noun'.