File: Query.xquery
declare namespace math = "http://java2s.com";
declare variable $n as xs:integer external;
declare function math:factorial($integer as xs:integer) as xs:double
{
if ($integer gt 1) then $integer * math:factorial($integer - 1) else 1
};
concat(2, "! = ", math:factorial(2))
Output:
<?xml version="1.0" encoding="UTF-8"?>2! = 2
|