What does the "LET" prefix imply for a variable?

The "LET" prefix in Qlik Sense signifies that an expression or calculation will be evaluated, and the resulting value will be assigned to a variable. When you use the "LET" command, the expression to its right is calculated in its entirety before assignment, which allows for dynamic values to be stored in a variable. This enables users to perform complex operations or calculations and store the outcome for later use, enhancing the flexibility of data modeling and analysis.

In contrast, the other options suggest fixed behaviors that are not applicable to the "LET" prefix. For instance, assigning a fixed value would typically be done with a simple assignment without the need for evaluation. Concatenating strings is a manipulation of text that does not involve the evaluation of expressions in the same way "LET" does. Similarly, creating a bookmark is unrelated to variable assignment, as bookmarks are used for saving and retrieving selections within the application rather than calculating values.