What is JSP Scriptlet?

Answer: JSP Scriptlet is jsp tag which is used to enclose java code in the JSP pages. Scriptlets begins with <% tag and ends with %> tag. Java code written inside scriptlet executes every time the JSP is invoked.

Example:

        <% 
        //java codes 
         String userName=null; 
         userName=request.getParameter("userName"); 
         %>