Recursive function : function « XQuery « XML

1. XML
2. XQuery
3. function

Recursive function

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

 

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