Found this looking at the test case for MiscKit which DayLite uses for the merge engine for HUD widgets.

<$procedure myproc num$>
	Number=<$num$>.<br />
	Result=<$if num > 1$>4<$else$>6<$endif$>.<br />
	Add=<$<$num$> + 1$><br />
<$endprocedure$>

<$call myproc 0$>