JSTL fn:length() Function

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

Syntax:

The fn:length() function has following syntax:

int length(java.lang.Object)

Example:

Following is the example to explain the functionality of this 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>

This would produce following result:

Length of String (1) : 21
Length of String (2) : 22


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