This section discusses the advanced topics of dynamic expressions, dynamic evaluation, and dynamic variable naming. Many ColdFusion programmers never encounter or need to use dynamic expressions. However, dynamic variable naming is important in situations where the variable names are not known in advance, such as in shopping cart applications.

This section also discusses the use of the IIf function, which is most often used without dynamic expressions. This function dynamically evaluates its arguments, and you must often use the DE function to prevent the evaluation. For more information on using the IIF function, see Using the IIF function.