Question

what does n mean

Answer 1

as in n numbers?

Answer 2

if so, n is just a notation used to describe how n can be any number.

Answer 3

n is a generic term to denote a variable.

Answer 4

more often than not, n refers to natural numbers but n can be anything
standards
\[n\in N = natural\space numbers\\
k\in Z = integers\\x\in R = real\space numbers \\c\in C=complex \space numbers\]

Answer 5

but again, I see n is integer all the time. But I never see it being used as a non discrete variable. I never see it used for R