JSTL fn:length() function

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The JSTL fn:length() function is used to get the length of the object. It returns no. of characters in case of string input and no. of elements in case of collection.

Syntax: 

int length(String inputString/Collection object)

Example:

test.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
 
<html>
	<head>
		<title>fn:length JSTL function example</title>
	</head>
	<body>
		<c:set var="testString" 
                    value="Hello this is a JSTL function example."/>
		Length of the given string: <br/>
		<c:out value="${fn:length(testString)}" />
	</body>
</html>

web.xml

<web-app>
 
  <welcome-file-list>
          <welcome-file>test.jsp</welcome-file>
  </welcome-file-list>	
 
</web-app>

Output:

jsp example 59
 
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