Updating counter in XQuery

Question

I want to create a counter in xquery. My initial attempt looked like the following:

let $count := 0
for $prod in $         


        

Answer 1

Use xdmp:set instead of the below query

let $count := 0
for $prod in (1 to 4)
return ( xdmp:set($count,number($count+1)) ,{$count }