Display null as " 0 "

Display null as " 0 "

Good day Zoho Gurus,

I have this in an html filter:

<%for each x in VAR_Staff
    {
        Person = x.Short_Name;
        HoursTotal_0_7 = Packaging_Process_Person_Workload[(Staff_Name == Person && (Due_Date <= (zoho.currentdate  +  '1W:0D:0H:0M:0S') && Due_Date >= zoho.currentdate))].sum(Estimated_Hours);
        HoursTotal_7_14 = Packaging_Process_Person_Workload[(Staff_Name == Person && (Due_Date <= (zoho.currentdate  +  '2W:0D:0H:0M:0S') && Due_Date >= zoho.currentdate))].sum(Estimated_Hours);
        HoursTotal_14_21 = Packaging_Process_Person_Workload[(Staff_Name == Person && (Due_Date <= (zoho.currentdate  +  '3W:0D:0H:0M:0S') && Due_Date >= zoho.currentdate))].sum(Estimated_Hours);
        HoursTotal_21_plus = Packaging_Process_Person_Workload[Staff_Name == Person].sum(Estimated_Hours);%>
    <tr class=zc-viewrow>
<td><%=Person%></td>
<td><%=HoursTotal_0_7%></td>
<td><%=HoursTotal_7_14%></td>
<td><%=HoursTotal_14_21%></td>
<td><%=HoursTotal_21_plus%></td></tr>                <%}%>

How can I get values in my html tables of  cero instead of "null" (of course, when the sum(Estimated_Hours) = 0) ?

Thanks !