XML Tutorial/XSLT stylesheet/true

true() and false() function

   <source lang="xml">

File: Transform.xslt

<?xml version="1.0"?> <xsl:stylesheet version="1.0"

 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:xs="http://www.w3.org/2001/XMLSchema">
 <xsl:output method="text"/>
 <xsl:template match="/">
   <xsl:text>Tests of addition in XPath 1.0
</xsl:text>
   <xsl:text>
  9 + 3 = </xsl:text>
   <xsl:value-of select="9 + 3"/>
   <xsl:text>
  9 + 3.8 = </xsl:text>
   <xsl:value-of select="9 + 3.8"/>
   <xsl:text>
  9 + "4" = </xsl:text>
   <xsl:value-of select="9 + "4""/>
   <xsl:text>
  9 + "Q" = </xsl:text>
   <xsl:value-of select="9 + "Q""/>
   <xsl:text>
  9 + true() = </xsl:text>
   <xsl:value-of select="9 + true()"/>
   <xsl:text>
  9 + false() = </xsl:text>
   <xsl:value-of select="9 + false()"/>
 </xsl:template>

</xsl:stylesheet> Output: Tests of addition in XPath 1.0

 9 + 3 = 12
 9 + 3.8 = 12.8
 9 + "4" = 13
 9 + "Q" = NaN
 9 + true() = 10
 9 + false() = 9</source>