Why is the 'break' statement used in a switch case?

The 'break' statement in a switch case is essential for controlling the flow of execution within the structure. When a switch statement is executed, and a matching case is found, the code associated with that case is executed. However, without the 'break' statement, the execution will continue into the subsequent case blocks. This behavior, known as "fall-through," can lead to unintended results where multiple cases are executed even if only one match was meant to trigger an action.

Using 'break' effectively terminates the current case execution and transfers control out of the switch statement, allowing the program to continue with the next lines of code following the switch construct. This ensures that once the desired case is processed, the program flow correctly resumes outside of the switch block, maintaining the intended logic of the program.

While other responses touch on aspects of the switch structure, they do not accurately describe the specific function of the 'break' statement in controlling program flow and preventing unintended fall-through behavior.