%PrevV function

Function

The function returns the previous value of the argument. Function usefulness - Eval tags.

Declaration

UNIVAL  %PrevV(
   UNIVAL in Arg
 )

Parameters

Arg

Expression of optional type.

Note

Based on the way of evaluation of eval tag the result will be:

periodical eval tag - returns the value of argument valid during previous calculation,
on-change eval tag - returns the previous value of the argument.