---
title: "Expression Functions"
---

# Expression Functions

> The expression language is used to define dynamic values for component properties and expression tags. Expressions often involve one or more other values that are used to calculate a final value. Expressions don't do anything, other than return a value.

For an overview and syntax of the expression language, see [Expression Language Overview and Syntax](platform\expression-language-and-syntax\expression-language-and-syntax.md).