Exit() function in C
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The exit function in C is used to terminate a program execution immediately.
It allows you to exit a program gracefully by returning a status code to the operating system.
Syntax:
void exit(int status);
status: An integer value representing the exit status of the program.
Types of exit
1 Normal Exit: exit(0) or exit(EXIT_SUCCESS)
2 Abnormal Exit: exit(EXIT_FAILURE)
Examples:
1 Normal Exit
#include<stdio.h>#include<stdlib.h> int main() { printf("Program will exit normally.\n"); exit(EXIT_SUCCESS); printf("This line won't be executed.\n"); }
Output:
Program will exit normally.
2 Abnormal Exit
#include<stdio.h>#include<stdlib.h> int main() { printf("Program will exit abnormally.\n"); exit(EXIT_FAILURE); printf("This line won't be executed.\n"); }
Output:
Program will exit abnormally.
Importance of Exit Function in C
Graceful Termination: Allows the program to shut down in an organized manner.
Cleanup: Useful for performing cleanup tasks like closing files or freeing memory before exiting.
Exit Status: Provides a way to communicate the exit status to the calling environment or parent process.
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