sure, the syntax is fine, but that's not really 'triple line spacing
between paragraphs'. triple line spacing (which is a very big space
relative to the text) could be achieved with:
\setlength{\parskip}{3\baselineskip}
cheers,
jon.
No. No.
1) you would still have the regular baseline skip in addition
to parskip, so that "3" implies quadruple spacing. You meant
\setlength{\parskip}{2\baselineskip}
2) The multiplier for "double" and "triple" spacing isn't
mecessarily arithmetic, but depends on the appearance of the
font. For Computer Modern with its small "x" height (or
bloated capitals) "double" spacing is best done with
\baselineskip=1.66\normalbaselineskip
So by that measure, for computer modern, "triple" space
between paragraphs would be 2.33\normalbaselineskip, so
\setlength{\parskip}{1.33\baselineskip}
bonus 3) There are lots of little parts of the document
that are "paragraphs" to TeX where you may not want the
big \parskip. It is probably best to use the parskip package
so the extra space is inserted only where desired.
Donald Arseneau