# 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:

![](https://3821468174-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LrTlA1suFa5N48x_83N%2F-MAlPVpH3WRwBy16c7JY%2F-MAlQBZuuTnc6hyzKSVQ%2Fimage.png?alt=media\&token=5c9534b7-ca05-4ac4-b408-2207cd5a5295)

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

* [Functions List](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-list)
* [Functions Descriptions](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions)