The When prefix can be described as a compact alternative to which statement?

The When prefix serves as a compact alternative to the If..else statement in Qlik Sense scripting. It allows for streamlined conditional checks by evaluating a series of conditions and executing the corresponding expression for the first condition that evaluates to true. This makes the syntax more concise compared to the traditional If..else structure, especially when dealing with multiple conditions.

Using the When prefix, you can write cleaner and more readable code, which is particularly beneficial in complex expressions or when multiple conditions need to be assessed. This enhances code maintainability and readability, allowing developers to quickly grasp the logic being applied without the verbosity of multiple If..else statements.

In contrast, the other options, such as Switch, While, and Case, serve different purposes in programming and data expression logic. Switch is typically used for selecting one of many expressions based on the value of a single variable, While is suited for looping through data, and Case is often used in different programming contexts but not directly comparable to the compact functionality offered by When concerning conditional evaluations.