Header File 

stdlib.h 

Category 

Process Control Routines 

Prototype 

void abort(void); 

Description 

Abnormally terminates a program. 

abort causes an abnormal program termination by calling raise(SIGABRT). If there is no signal handler for SIGABRT, then abort writes a termination message (Abnormal program termination) on stderr, then aborts the program by a call to _exit with exit code 3. 

Return Value 

abort returns the exit code 3 to the parent process or to the operating system command processor. 

Example  

#include <stdio.h>
#include <stdlib.h>
 int main(void)
 {
   printf("Calling abort()\n");
   abort();
   return 0; /* This is never reached */
 }

Portability