XML Tutorial/XSLT stylesheet/true

true() and false() function

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&#xA;</xsl:text>
    <xsl:text>&#xA;  9 + 3 = </xsl:text>
    <xsl:value-of select="9 + 3"/>
    <xsl:text>&#xA;  9 + 3.8 = </xsl:text>
    <xsl:value-of select="9 + 3.8"/>
    <xsl:text>&#xA;  9 + "4" = </xsl:text>
    <xsl:value-of select="9 + "4""/>
    <xsl:text>&#xA;  9 + "Q" = </xsl:text>
    <xsl:value-of select="9 + "Q""/>
    <xsl:text>&#xA;  9 + true() = </xsl:text>
    <xsl:value-of select="9 + true()"/>
    <xsl:text>&#xA;  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