Question

I am dealing with problem in JSP. Basically, I want to take float number such as 0.4311223 and turn it to 4 here is how I do it:

                <c:set var="age" value="${(0.4311223 * 10)}" />

                <fmt:formatNumber var="ageRatio"
                type="number"
                value="${age}"
                maxFractionDigits="0"/>

                Age ratio: ${ageRatio}<br />

It prints empty string, when I print ${age} it prints correct value of 4.311223.

Answer 1

Did you include the taglib?

<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>

Please try to add the minFractionDigits attribute. I think you can remove the type attribute too.

<fmt:formatNumber value="${age}" minFractionDigits="0" maxFractionDigits="0"/>