How to use the exit() function in C language

In C language, the exit() function is used to terminate program execution and return an exit status code, indicating the status of program execution. 0 usually represents success. Other common status codes include general errors, invalid parameters and memory allocation. fail.

Usage of exit() function in C language

In C language, exit() function is used for termination The program executes and returns an exit status code.

Function prototype

<code class="c">void exit(int status);</code>

Parameters

• status: The exit status returned by the program Code, type is int. This status code can be interpreted by the parent process or the operating system.

Return value

The exit() function has no return value.

Usage

To terminate the execution of the program and return an exit status code, you can use the following syntax:

<code class="c">exit(status);</code>

where status is the value you want to return exit status code.

Exit status code

The exit status code is an integer, indicating the status of program execution. Common exit status codes are as follows:

• 0: Successful exit
• 1: General error
• 2: Invalid parameter
• 3: Memory allocation On failure

You can return any non-negative integer as the exit status code.

Note

• The exit() function terminates all activities of the program, including executing functions and threads.
• The exit() function closes all open files and releases all allocated memory.
• After using the exit() function, the program cannot continue to execute.

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