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[[Category:Analytica User Guide]]
[[Category: Definitions]]

<breadcrumbs>Analytica User Guide > {{PAGENAME}}</breadcrumbs>


This chapter introduces the tools for creating and editing mathematical models by giving each variable a formula that defines how to compute its value in its '''''definition'''''. The definition of a variable can be a simple number, text, a probability distribution, or a more complicated expression. It can also be a list or table of numbers or other expressions. Subsequent chapters present more details about using mathematical expressions, arrays, and probability distributions.

==Sections==
* [[Creating or editing a definition]]
* [[The Expression popup menu]]
* [[Expression Assist]]
* [[Object Finder dialog]]
* [[Definition menu]]
* [[The domain of possible values]]
* [[Check attribute]]
* [[Syntax coloring and fonts and error_underlining]]

==See Also==
* [[Definition menu]]
* [[Definition menu (more)]]
* [[Writing Array-Abstractable Definitions]]


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