XML Tutorial/XSLT stylesheet/ceiling

ceiling()- Takes a number as its argument and returns the smallest integer greater than this

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">
    ceiling(3.2) =
    <xsl:value-of select="ceiling(y)" />
  </xsl:template>
</xsl:stylesheet>
Output:

    ceiling(3.2) =
    4