What Is the Difference Between and?
I've Noticed Usages of in One Place of Jsp Code and in the Other. the Things They Do Look the Same for Me. Are These Two Commands Just Aliases? 2 Answers
I've noticed usages of <c:if ...> in one place of JSP code and <c:when ...> in the other. The things they do look the same for me. Are these two commands just aliases?
2 Answers
<c:if is a simple if-clause. <c:when> has options for multiple if-clauses and an else clause. Compare:
<c:if test="${foo == 'bar'}">...</c:if>
with
<c:choose>
<c:when test="${foo == 'bar'}">...</c:when>
<c:when test="${foo == 'baz'}">...</c:when>
<c:otherwise>...</c:otherwise>
</c:choose>
<c:if> doesn't support any kind of "else" or "else if" functionality. <c:when> does. So if you need something analogous to
if (some_condition) {
// ...
}
then use <c:if>. If you need something analogous to
if (some_condition) {
// ...
} else if (some_other_condition) {
// ...
} else {
// ...
}
then use <c:choose> with <c:when> and (optionally) <c:otherwise>.
Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.
