What is a "callback" function in Avaloq Script?

A "callback" function in Avaloq Script refers to a function that is passed as an argument to another function. This concept enables a higher degree of flexibility and allows for asynchronous or event-driven programming paradigms. By using a callback function, a developer can define a block of code that can be executed after a certain task or operation has been completed, thus controlling the flow of the program based on specific conditions or events.

For instance, this can be particularly useful in situations where a function needs to perform some operations, and then, once those operations are finished, it should trigger another piece of code to execute. This approach is fundamental in managing tasks such as handling user inputs, responding to API calls, or processing data in a more efficient manner.

The other concepts outlined in the options do not accurately describe the role of a callback function. A function that is called before another function describes a different relationship in execution order, and a function executed simultaneously with another does not convey the same control flow pattern inherent in callbacks. Lastly, a function that runs in a loop pertains to repetition in code execution rather than the coordination between functions based on parameters.