What term is used to define the end of algorithm execution?

The term that defines the end of algorithm execution is "Termination." In the context of algorithms, termination refers to the point at which the algorithm completes its process and yields a result, regardless of whether that result is successful or indicates failure.

A well-structured algorithm will have a defined point at which it stops executing, ensuring that it does not continue infinitely without producing output. This is essential for effective algorithm design, as it allows users to know when they can expect results and helps in managing resources. Algorithms that don't terminate properly can lead to issues such as infinite loops, where execution never concludes, consuming resources unnecessarily.

In practical scenarios, understanding termination is crucial for debugging and optimizing algorithms, as well as for practical applications where timely completion is necessary.