[xquery-talk] Use of for in XQuery

[Per Bothner]

> pl see the XQuery as follows :-
> 
> let $a := doc ("boxes.xml")/boxes/box
> 
> let $b := $a/length
> let $c := $a/breadth
> 
> let $d := count ($a)
> 
> let $area := ()
> 
> for $i in (1 to $d) return 
> sum (($area,$b[$i]*$c[$i])) 

This is an unusual variation of Standard XQuery Beginner Confusion #1.
The function sun does *not* increment anything.  It returns the sum
of the items in the argument.

XQuery does not have side-effects - once you've defined a variable,
it's value doesn't change.
-- 
	--Per Bothner
per at bothner.com   http://per.bothner.com/