Summary
You just learned a lot about how to write expression rules in Appian. From simple decision tables to constants, to simple and more complex expressions, you can now add exciting new features to your applications.
Even with expression rules, low-code with Appian is still low-code. You will spend the most time building process models and refining interfaces. Expression rules give you just that level of flexibility you need to create a gorgeous application.
In the next chapter, we will learn how to integrate an external system using web services.
