Peafunktsioonile

Peafunktsioonile is the Estonian form used in programming texts to refer to the peafunktsioon (main function), the entry point of a program. The main function is where execution begins after the runtime initializes the process, and it typically coordinates startup tasks, such as setting up resources, processing command-line arguments, and delegating work to other parts of the program.

The exact signature and return value of the main function vary by language. In C and C++, the common forms are int main(int argc, char* argv[]) or int main(void), with argc/argv containing command-line arguments and the return value serving as the program’s exit status to the operating system. In Java, the entry point is public static void main(String[] args), and the runtime invokes this method when starting a standalone application. In Python, there is no mandated main function; scripts run from top level, though developers often define a main() and call it under if __name__ == "__main__": to enable reuse as a module and for testing.

Some languages provide alternative entry points or have the runtime determine the starting point, which can affect portability and testing strategies. Regardless of language, the main function is usually expected to terminate with a clear exit status and to perform necessary cleanup.

Best practices emphasize keeping main concise, delegating substantial work to other functions or modules, validating inputs, handling errors gracefully, and ensuring resources are released before exiting. In sum, peafunktsioonile denotes the program’s startup hub, whose form and behavior reflect language-specific conventions but share a common goal: starting and organizing program execution.