What are constants used for in expression rules?

Constants in expression rules are utilized to store predictable values that do not change over time. This use of constants helps maintain consistency and reliability within application logic. For example, if an application requires a specific tax rate or a fixed threshold for alerts, defining these values as constants allows developers to reference them easily throughout their expressions without the risk of unintentional modification.

By employing constants, developers can also enhance the readability and maintainability of their code. Instead of hardcoding a value multiple times, which might lead to errors if the value needs to be updated later, a single definition as a constant provides a single point of truth.

Additionally, while declaring variables, defining user permissions, and creating dynamic content are all vital elements in application design, they do not directly reflect the primary function of constants. Constants specifically serve to hold fixed values that enhance stability and ease of updates across the application’s expressions.