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Lesson 3. Variables and Functions > Examining Functions

Examining Functions

Functions are another integral part of ColdFusion. They give you the ability to perform different types of tasks. There are functions to work with many types of variables, such as dates, times, and text variables. There are also functions for formatting text variables. Each function performs a specific task. Some functions create dates, or add to dates. Some functions remove white space from variables. Other functions perform mathematical operations such as taking the absolute value for a number, determining the sine or cosine of a number, or even generating random numbers. There are numerous functions to work with arrays, lists, and structures, which are more advanced variables.

Boolean functions return either a true or false value. Boolean functions can determine if a variable exists, or if a variable is a valid date, structure, or array.


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