if statement in for-each loop : if « XSLT stylesheet « XML

1. XML
2. XSLT stylesheet
3. if

if statement in for-each loop

File: Data.xml 
<?xml version="1.0"?>
<book>
     <title>title 4</title>
     <author>author 1</author>
     <author>author 2</author>
     <author>author 3</author>
     <author>author 4</author>
</book>

File: Transform.xslt

<?xml version="1.0"?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0">

  <xsl:template match="book">
    <xsl:value-of select="title" />
    by
    <xsl:for-each select="author">
      <xsl:value-of select="." />
      <xsl:if test="position()!=last()">,</xsl:if>
      <xsl:if test="position()=last()-1">and</xsl:if>
    </xsl:for-each>
  </xsl:template>

</xsl:transform>


Output:

<?xml version="1.0" encoding="UTF-8"?>title 4
    by
    author 1,author 2,author 3,andauthor 4

 

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