A declaration tag is a piece of Java code for declaring variables, methods and classes. If we declare a variable or method inside declaration tag it means that the declaration is made inside the servlet class but outside the service method.

What is the use of tag in JSP?

A tag file is a source file containing a reusable fragment of JSP code that is translated into a simple tag handler by the web container. Tag files can be used to develop custom tags that are presentation-centric or that can take advantage of existing tag libraries, or by page authors who do not know Java.

What is the syntax of JSP?

S.No.Syntax & Purpose1jsp:include Includes a file at the time the page is requested.2jsp:useBean Finds or instantiates a JavaBean.3jsp:setProperty Sets the property of a JavaBean.4jsp:getProperty Inserts the property of a JavaBean into the output.