JSTL Function fn:length Example

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Last Updated on 31 August 2019   |   Print  Email


This post helps you understand how to use the <fn:length> tag in the JSTL function tags library with code example.

The fn:length function returns the number of characters in a string or number of items in any collection.

 

JSTL <fn:length> Syntax:

${fn:length(collection | string)}

 

JSTL <fn:length> Example:

The below code example prints the number of characters in a string.

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>fn:length Demo</title>
  </head>
  <body>
	<h1>fn:length Demo</h1>

	<c:set var="text" value="Code Java" />
	<c:out value="${text}"/>
	<p>Length: ${fn:length(text)}</p>	
  </body>
</html>

 

Output:

JSTL function fn-length

 

Other JSTL Function Tags:

contains  |  containsIgnoreCase  |  endsWith |  escapeXml  |  indexOf  |  join  |  replace  |  split  |  startsWith  |  substring  |  substringAfter  |  substringBefore  |  toLowercase  |  toUpperCase  |  trim


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