JSTL - fn:length() Function

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

Syntax

The fn:length() function has the following syntax −

int length(java.lang.Object)

Example

Following example explains the functionality of the fn:length() function −

<%@ 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>Using JSTL Functions</title>
   </head>

   <body>
      <c:set var = "string1" value = "This is first String."/>
      <c:set var = "string2" value = "This is second String." />
      <p>Length of String (1) : ${fn:length(string1)}</p>
      <p>Length of String (2) : ${fn:length(string2)}</p>
   </body>
</html>

You will receive the following result −

Length of String (1) : 21
Length of String (2) : 22
jsp_standard_tag_library.htm
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