%@page errorPage="error.jsp" %>
Showing Error Page.
<%
if(request.getParameter("txtNum") != null){
if(!request.getParameter("txtNum").equals("")){
int div = Integer.parseInt(request.getParameter("txtNum")) / 0;
out.println("Answer is: " + div);
}
else{
out.println("Please enter a number.");
}
}
%>