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Chapter 30. User-Defined Functions > Understanding User-Defined Functions

Understanding User-Defined Functions

ColdFusion Markup Language (CFML) is made up of tags and functions. The prior two chapters reviewed the ability to create your own tags; this chapter reviews creating your own functions.

User-defined functions (UDFs) are just that: functions you create for use in your own applications. UDFs are similar to custom tags in that they allow developers to encapsulate tried-and-true functionality for the reuse of code throughout and between ColdFusion applications.


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