The function exit terminates calling process normally. Before terminating a process, it performs the following operations:
- Functions registered with atexit are called.
- All streams/files are closed and flushed if buffered, and all files created with tmpfile are removed.
- Control is returned to the calling(host) environment.
Function prototype of exit
void exit(int status);
-
status : This is the status code returned to the host environment.
- If status is EXIT_SUCCESS or 0, it indicates successful exit.
- If status is EXIT_FAILURE or nonzero, it indicates failure.
Return value of exit
NONE
C program using exit function
The following program shows the use of exit function to terminate execution of program before it's completion.
#include <stdio.h>
#include <stdlib.h>
int main(){
printf("Program start\n");
/* Terminating program using exit */
exit(0);
printf("It won't get printed ever\n");
return 0;
}
Output
Program start