sentences:  This means that jumping into a function which was exited via a call to codice_2 is undefined.However, most implementations of codice_2 leave the stack frame intact, allowing codice_1 and codice_2 to be used to jump back-and-forth between two or more functions—a feature exploited for multitasking.Compared to mechanisms in higher-level programming languages such as Python, Java, C++, C#, and even pre-C languages such as Algol 60, the technique of using codice_1/codice_2 to implement an exception mechanism is cumbersome.