Which of the following is a common use of 'void' in function definitions?

The use of 'void' in function definitions serves a specific purpose in programming languages, primarily indicating that a function does not return a value to its caller. When a function is declared with the 'void' return type, it signifies that the purpose of the function is to perform an action rather than compute and return a specific value. This can include tasks like printing to the console, modifying global state, or performing actions that do not need to return information back to the part of the program that called the function.

This is a fundamental concept in many programming languages, including C, C++, Java, and others, and understanding this helps in grasping how functions can be structured and utilized to design a program effectively. The other options provided relate to different constructs and functionalities that do not pertain to the specific role of 'void' in function definitions.