XPath - Number Operators / Functions

XPath defines the following operators on numbers to be used with the XPath expressions.

S.No.	Operator & Description
1	+ used for addition operation
2	- used for subtraction operation
3	* used for multiplication operation
4	div used for division operation
5	mod used for modulo operation

XPath defines the following functions on numbers to be used with the XPath expressions.

S.No.	Function & Description
1	ceiling() returns the smallest integer larger than the value provided.
2	floor() returns the largest integer smaller than the value provided.
3	round() returns the rounded value to nearest integer.
4	sum() returns the sum of two numbers.

Example

This example creates a table of <student> element with its attribute roll no and its child <firstname>,<lastname><nickname> and <marks> by iterating over each student. It calculates grades of the student and then prints the student(s) details.

students.xml

<?xml version = "1.0"?>
<?xml-stylesheet type = "text/xsl" href = "students.xsl"?>
<class>
   <student rollno = "393">
      <firstname>Dinkar</firstname>
      <lastname>Kad</lastname>
      <nickname>Dinkar</nickname>
      <marks>85</marks>
   </student>
   <student rollno = "493">
      <firstname>Vaneet</firstname>
      <lastname>Gupta</lastname>
      <nickname>Vinni</nickname>
      <marks>95</marks>
   </student>
   <student rollno = "593">
      <firstname>Jasvir</firstname>
      <lastname>Singh</lastname>
      <nickname>Jazz</nickname>
      <marks>90</marks>
   </student>
</class>

students.xsl

<?xml version = "1.0" encoding = "UTF-8"?>
<xsl:stylesheet version = "1.0"
   xmlns:xsl = "http://www.w3.org/1999/XSL/Transform">  

   <xsl:template match = "/">
      <html>
         <body>
            <h2>Students</h2>
				
            <table border = "1">
               <tr bgcolor = "#9acd32">
                  <th>Roll No</th>
                  <th>First Name</th>
                  <th>Last Name</th>
                  <th>Nick Name</th>
                  <th>Marks</th>
                  <th>Grade</th>
               </tr>
					
               <xsl:for-each select = "class/student">
                  <tr>
                     <td><xsl:value-of select = "@rollno"/></td>
                     <td><xsl:value-of select = "firstname"/></td>
                     <td><xsl:value-of select = "lastname"/></td>
                     <td><xsl:value-of select = "nickname"/></td>
                     <td><xsl:value-of select = "marks"/></td>
							
                     <td>
                        <xsl:choose>
                           <xsl:when test = "marks div 90 > 1">
                              High
                           </xsl:when>
							
                           <xsl:when test = "marks div 80 > 1">
                              Medium
                           </xsl:when>
							
                           <xsl:otherwise>
                              Low
                           </xsl:otherwise>
                        </xsl:choose>
	  
                     </td>
                  </tr>	
               </xsl:for-each>
            </table>
         </body>
      </html>
   </xsl:template>

</xsl:stylesheet>

Verify the output

xpath_operators.htm