What does the term 'call a function' refer to?

The term 'call a function' refers specifically to executing the code defined within that function. When a function is called, the program temporarily leaves the current execution context to run the code within the function, which may perform a specific task, compute a value, or return results back to the calling code.

In programming, a function is a reusable block of code designed to perform a particular operation; calling it triggers this block to be executed with the necessary parameters, if any are required. This process allows programmers to organize their code more efficiently and avoid repetition.

The other options pertain to different aspects of using functions. Creating a new function involves defining its code but does not execute it. Defining parameters relates to specifying the input that the function can accept, rather than executing it. Commenting out a function means disabling its execution by placing comment markers around the code, which prevents it from running when the program is executed. Therefore, the action of calling a function is distinct in that it actually runs the code encapsulated by that function.