# Expressions An overview and explanation of using expressions in Jigx is provided in the [Expressions](https://docs.jigx.com/building-apps-with-jigx/logic/expressions) and [Advanced Expressions](https://docs.jigx.com/building-apps-with-jigx/logic/expressions#advanced-expressions) section in the Guide tab. Refer to the following topics for more information: * [Expressions - cheatsheet](https://docs.jigx.com/building-apps-with-jigx/logic/expressions/expressions-cheatsheet) for code snippets that can help you achieve a required result, such as creating a placeholder in a jig. * [Expression - Common patterns](https://docs.jigx.com/building-apps-with-jigx/logic/expressions/expressions-common-patterns) * [Expression - Quick reference](https://docs.jigx.com/building-apps-with-jigx/logic/expressions/expression-quick-reference) In this section, examples with code snippets are provided for working with data using JSONata; these are:

JSONata	Example of use
Arrays	Create filtered lists from arrays and handling arrays with SQL and Dynamic Data
Aggregation	To return the minimum, maximum, or average value in an array.
Boolean	Evaluate data to find a true or false result.
Comparison Operators	Compare values in data and use the value in a conditional logical expression, e.g., is an amount greater than 100.
Date & Time	Return a date and time in various formats, e.g., ISO 8601.
Path Operators	Navigate and access specific elements or properties within a data set, e.g., for filtering or searching.
Functional Programming	Compare values or display data based on certain conditions and use logical statements, e.g., adding HTML variables in content or a multi-select as a `functionParameter`.
Jigx Variables	Jigx variable set used in expressions to manipulate data specific to a Jigx App, e.g., determining the logged-in user or the organization and solution.
Predicate Queries	Used for query refinement.
String	String expressions have many uses, such as concatenating two strings to display multiple data records in one row, writing numbers as strings, or selecting only a few characters from the whole string.
Advanced expressions	Advanced expressions are helpful when you need to filter an array of records to display specific data and perform expression transformations over the data.
Regex +JSONata	Create validation for text fields by combining JSONata and Regex expressions.
JavaScript expressions	JavaScript functions allow you to write modular and reusable code, by encapsulating specific functionality within JavaScript functions and calling the function in an expression.

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