How to set result of a java expression in a property in JSP?

The <c:set> tag is JSTL-friendly version of the setProperty action. The tag is helpful because it evaluates an expression and uses the results to set a value of a JavaBean or a java.util.Map object.

Attribute

The <c:set> tag has the following attributes −

Attribute	Description	Required	Default
Value	Information to save	No	body
target	Name of the variable whose property should be modified	No	None
property	Property to modify	No	None
var	Name of the variable to store information	No	None
scope	Scope of variable to store information	No	Page

If target is specified, property must also be specified.

Example

<%@ taglib uri = "https://java.sun.com/jsp/jstl/core" prefix = "c" %>
<html>
   <head>
      <title><c:set> Tag Example</title>
   </head>
   <body>
      <c:set var = "salary" scope = "session" value = "${2000*2}"/>
      <c:out value = "${salary}"/>
   </body>
</html>

The above code will generate the following result −