Logical Operator in JSP Expression Language
What are the JSP Expression Language Logical Operators?
Explanation
JSP Expression Language Logical operators are used with two operands that returns either a "true" or "false" value.
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<h5>Not Operator</h5>
<c:if test="$!{3>1}" var="b" />
The result of using NOT operator with (3>1) is: ${b} Result :
Not Operator
The result of using NOT operator with (3>1) is: false
In the above example we have use "!" operator, used with a expression "3>1" which is "true". Since the "!" operator is used it becomes "false", this boolean value is stored in a variable "boo" and displayed.
| Logic | Expression | Result |
| And | ${true and true} | true |
| And | ${true && false} | false |
| Or | ${true or true} | true |
| Or | ${true || false} | true |
| Not | ${not true} | false |
| Not | ${!false} | true |
Example :
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<h5>Not Operator</h5>
<c:if test="$!{3>1}" var="b" />
The result of using NOT operator with (3>1) is: ${b}
Not Operator
The result of using NOT operator with (3>1) is: false
In the above example we have use "!" operator, used with a expression "3>1" which is "true". Since the "!" operator is used it becomes "false", this boolean value is stored in a variable "boo" and displayed.
