st: counting number of variables in a varlist

["ali hashemi" <hashemi@vt.edu>]

Dear list members,

I would like to count the number of variables in a varlist. The way I manage
to do this is as follows:

local i=0
foreach var in x1 x2 {
local i=`i'+1
}

I was wondering if there is any built-in command which does the same thing.

Any help is much appreciated
Ali

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