# Functions

Functions are "self contained" modules of code that accomplish a specific task. Functions usually "take in" data, the input parameters, process it, and "return" a result.

All functions in Kalipso are available for the following operating systems:

![](/files/-MAlQBZuuTnc6hyzKSVQ)

In this group of pages you can access the list of functions and their description:

* [Functions List](/kalipso5/developing/form/expressions/functions/functions-list.md)
* [Functions Descriptions](/kalipso5/developing/form/expressions/functions/functions-descriptions.md)


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