declare the variable sym to be a session variable, with the initial value Null
set the initial value of the session variable sym to be value
- This is a scoping construct for declaring a variable to be a session variable.
- The values of a session variable will be stored in a session managed by the servlet container.
- Sessions are a standard feature of modern web servers/browsers and are used to store information on a server.
- A session value will live from one call of the server to another.