Use count function in math calculation : count « XSLT stylesheet « XML Tutorial

File: Data.xml
<?xml version="1.0"?>
<numbers>
  <x>4</x>
  <y>3.2</y>
  <z>11</z>
</numbers>


File: Transform.xslt
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0">
  <xsl:output method="xml" omit-xml-declaration="yes" />

  <xsl:template match="numbers">
    11 + count(*) =
    <xsl:value-of select="11+count(*)" />

  </xsl:template>

</xsl:stylesheet>

Output:


    11 + count(*) =
    14

5.10.count
	5.10.1.	count()- Takes a node-set argument and returns a value equal to the number of nodes in the node-set
	5.10.2.	Use count function in math calculation
	5.10.3.	Count matches
	5.10.4.	Count node
	5.10.5.	count elements which occured in XML source
	5.10.6.	The count function returns the number of nodes in the argument node-set.