Difference between return and exit in C Language

1. exit is used to end the program at any time while the program is running. The exit parameter is returned to the OS. The exit function is also called implicitly at the end of the main function. When the exit function is run, it will first execute the function registered by the atexit () function, and then perform some self-cleaning work, refresh all output streams, close all open streams, and close temporary files created using the standard I/O function tmpfile. Exit is to end a process. It will delete the memory space used by the process and return the error message to the parent process. return is to return the function value and exit the function. 2. return indicates the language level. It indicates the return of the Call Stack, while exit indicates the system call level. It indicates the end of a process. 3. The exit function exits the application and returns a state of the application to the OS. This State identifies some running information of the application. It is related to machines and operating systems. Generally, 0 indicates normal exit. If not 0 indicates abnormal exit. The void exit (int status) function prototype is abnormal. (The header file stdlib. h) 4. return indicates a function call. If the main function is returned, exit indicates that the program is forcibly exited at the call. Once the program is run, it ends.