What is a Declaration ?
A declaration declares one or more variables or methods for use later in the JSP source file.
A declaration must contain at least one complete declarative statement. You can declare any number of variables or methods within one declaration tag, as long as they are separated by semicolons.
The declaration must be valid in the scripting language used in the JSP file.
<%! somedeclarations %> <%! int i = 0; %> <%! int a, b, c; %>