# Formal notation for number of rows/columns in a matrix

Is there a generally accepted formal notation for denoting the number of columns a matrix has (e.g to use in pseudocode/algorithm environment in LaTeX)? Something I could use in the description of an algorithm like:

if horizontaldim(V) > x then
end if


or

if size(V,2) > x then
end if


or should I just use a description like

if number of columns in V > x then
end if

-

None that I know of, but I've seen numerical linear algebra books (e.g. Golub and Van Loan) just say something like $V\in\mathbb{R}^{m\times n}$ for a matrix V with m rows and n columns, and then use m and n in the following algorithm description.
Might be obvious, but for completeness' sake: if V is a complex matrix, then it should be $V\in\mathbb{C}^{m\times n}$ . – J. M. Aug 15 '10 at 1:59