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A function is a procedure that can be called, which returns a value. Functions can optionally take parameters.

There are three types of functions in ADRIFT. These are:

Every item in ADRIFT can be referred to by it's key. If you type a key (or a function that resolves to a key) then you can access all the properties of that item, in addition to special functions such as listing and counting etc.
These are distinguished from normal text by placing the percent (%) symbol before and after them. They sometimes have parameters which are enclosed in [square brackets].
These are a special set of functions that can only be used within Expressions. Most of these are either math functions or functions used to change a string of text.
These are functions which you create yourself using a task. References used in the task become parameters in the function call, and its completion message or restriction text is returned as the result of the function.

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