What occurs in a program when a function is invoked?

When a function is invoked in a program, the function's code executes. This means that the set of instructions defined within the function is carried out, allowing the program to perform a specific task or calculation that the function is designed to accomplish. During this process, any input parameters provided to the function can be used within its code to influence the outcome.

The process of invoking the function initiates a new execution context where the variables local to that function can be created, and the defined logic is carried out. This encapsulation of code serves to modularize the program, allowing for easier maintenance and reuse of the code in different parts of the application.

Other choices may imply aspects of function usage but do not correctly describe the fundamental action that occurs upon invocation. For instance, while a function may return an output, that action comes after the code execution, not during the invocation itself. The continuity of the program may vary depending on whether the function is blocking or non-blocking, and parameters are not simply discarded; they play a crucial role in providing inputs for the function’s operation. Thus, the execution of the function’s code is the primary and defining action that takes place when invoked.