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JSTL Function fn:length()

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The function <fn:length()> is the string function. This function used to find out the length of the entered string. This function displays the number of characters entered in the specified string.

Syntax of Function <fn:length()>

int length(Object)

Example of Function <fn:length()>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
<%@ 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>JSTL fn:length() example</title>
</head>
<body>
	<c:set var="string1" value="JavaBeat" />
	<c:set var="string2" value="welcome to JavaBeat.net" />
	Length of word JavaBeat is: ${fn:length(string1)}
	<br>
	<br> Length of word welcome to JavaBeat.net is:
	${fn:length(string2)}
	<br>
	<br>

</body>
</html>

Steps for Execution

  • Save this file as example.jsp in your eclipse IDE.
  • Now select this jsp file, right mouse click and select Run as ->Run on server

Output

When the execution process is completed successfully we will get the following output :
output of jstl function length

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He is Founder and Chief Editor of JavaBeat. He has more than 8+ years of experience on developing Web applications. He writes about Spring, DOJO, JSF, Hibernate and many other emerging technologies in this blog.