What designer constant is unlocked when a workflow is configured to "Iterative Macro"?

When a workflow is configured as an "Iterative Macro," it allows for the execution of a specific set of operations multiple times until a certain condition is met. This type of configuration provides access to certain constants that can be useful for tracking the iterations.

The constant that is specifically unlocked in this context is [Engine.IterationNumber]. This constant represents the current iteration of the macro during its execution. It allows users to monitor which iteration of the macro they are on, enabling them to perform operations that might depend on the iteration count, such as adjusting parameters, logging performance, or altering computations based on the iteration stage.

This constant's value can be particularly useful if the iterative logic requires differentiating between the iterations, which can help in debugging, performance monitoring, or adjusting the workflow's logic dynamically based on the iteration results. Understanding how this constant functions within an iterative macro is pivotal for advanced manipulation and analysis of data using Alteryx.