JSTL c:if Core Tag

The JSTL Core Tag is used in control flow. It evaluates an expression and execute a specific block of code is result returns true.

Syntax:

<c:if  test ="testCondition">
   //block of code 
</c:if>

c:if tag attributes:

AttributeDescriptionRequired
testIt specify the condition to evaluate.Yes
varIt specify the name of the variable to store the condition’s result.No
scopeIt specify the scope of the variable to store the condition’s result.No

Example:

test.jsp
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 
<html>
 <head>
  <title>c:if JSTL core tag example</title>
 </head>
 <body>
  <c:set var="num" value="100"/>
  <c:if test="${num > 0}">
   Num = <c:out value="${num}"/>
  </c:if>
 </body>
</html>
web.xml
<web-app>
 
  <welcome-file-list>
          <welcome-file>test.jsp</welcome-file>
  </welcome-file-list> 
 
</web-app>

Output:


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