The postcondition of a function determines how the function will complete its job. declares the function for the compiler. tells what will be true after the function executes. tells what must be true before the function executes.

The postcondition of a function is a crucial part of understanding its effects. It specifies the conditions that must hold true after the function has finished executing, essentially detailing what the function guarantees to achieve. This can help developers clarify their expectations and ensure that the function integrates smoothly within the broader application context. Understanding postconditions can improve your debugging skills! If a function doesn't meet its postconditions, it’s a sign something went wrong internally—or that inputs aren’t being handled correctly. By checking postconditions regularly, you can avoid the common mistake of assuming a function behaves as expected without proper validation, ensuring more robust and reliable code.