I want an HTML textbox value to be converted in a variable.
I have the following:
<input type="text" name="abc" value="0">
<br>
<%
String contb = request.getParameter("abc");
out.print("The result is: "+contb);
%>
Why do I receive a "NULL" result?
You want
<%
String contb = request.getParameter("abc");
out.print("The result is: " + contb);
%>
Note the spaces. If you leave no space between the string, "+" operator and contb then JavaScript cannot parse it as an operation
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