What is a void method in programming?

A void method in programming is defined as a method that does not return a value to the caller. This is indicated by the keyword "void" in the method declaration. When you create a void method, its primary purpose is to perform an action, such as modifying an object's state or producing output, rather than computing and returning a value.

In contrast, the other options do not accurately describe void methods. A method that must return a value would typically have a return type specified (such as int, String, etc.), directly contradicting the definition of a void method. Similarly, stating that a void method always returns an integer is incorrect, as void methods don't return any value at all. Lastly, the notion that a void method can only be called from the main method is misleading; void methods can be called from anywhere in the program, as long as they are accessible and in the correct context.

Therefore, the defining characteristic of a void method is its lack of a return type, which aligns perfectly with the assertion in the first choice.