JSTL Core <c:out> Tag

JSTL out tag is used to display information on JSP. It can also be used with properties of the bean.

The <c:out> tag displays the result of an expression, similar to the way <%= %> works with a difference that <c:out> tag lets you use the simpler "." notation to access properties. 

For example, to access employee.salary just use tag is <c:out value="employee.salary"/>.

JSTL <c:out> tag Example:
To display the salary of the employee on JSP, you can use the <c:out> tag like:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>JSTL c out Tag example</title>
  <c:out value="${employee.salary}" default="Not Available" escapeXml="true"></c:out>

The above statement assumes that employee object is available on this JSP and that employee bean has a property salary with setters and getter.

Attributes of <c:out> tag are:

Required Attributes:

1. value: This attribute needs expression to be evaluated.

Optional Attributes:

1. default: This attribute provides default value if the resulting value is null.
2. escapeXml: This attribute determines whether characters &,'," in the resulting string should be converted to their corresponding character entity codes. Default value is set to true.

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