What is the primary advantage of using DAX variables when dealing with repeated calculations?

Using DAX variables provides a significant advantage when dealing with repeated calculations by allowing you to store an interim calculation result for later use in the same expression. This approach not only enhances readability but also optimizes performance. By saving the result of a calculation in a variable, you avoid recalculating the same value multiple times, which can be computationally expensive. Instead of executing the same logic repeatedly, you simply reference the variable, thus reducing the overall computational load.

The benefit of DAX variables lies in their ability to streamline formulas and promote more efficient processing. In scenarios where the same calculation is needed in multiple places within a measure or a calculated column, utilizing a variable can greatly enhance both the performance and clarity of your DAX code.