Introduction to expressions
When you build a flow in Power Automate, it's easy to get started by adding a trigger and actions and then passing data between them with dynamic content. But, in most cases you need to perform more complex operations. You may want to do a calculation, to transform data for your solution, or access, convert, and compare values. To do these things, you can look to expressions.
In Power Automate, expressions are a set of simple functions that enable you to return data. Put simpler, you use expressions to write a formula to get your data the way you want it. Expressions allow you to do things like convert a date to UTC, divide two numbers, create that perfect string by combining fields, and much more all by using various functions.
Flows in Power Automate run on top of Azure Logic Apps. This is relevant because they both use all of the same functions. When you're searching the internet for solutions or reading documentation about Power Automate functions, it's common to end up looking at Logic Apps documentation. For example, the Reference Guide of functions for Power Automate is hosted on the Logic Apps side of the documentation.
Through the rest of this module, you'll learn about the different types of functions and the syntax so you can start to use expressions in your flows.