The function of return 0 in c language

The function of return 0 in C language is to inform the operating system that the program execution is successful without errors, and to end the program to release resources. It is used as the return value of the main function to indicate that the program has completed normal execution.

return 0 function in C language

return 0 is main## in C language # Common return values ​​of functions indicate that the program has been executed normally.

Function:

Inform the operating system that the program was executed successfully without any errors.
• Used to pass status information to other programs or calling functions, 0 indicates success.
• End the program and release allocated resources.

Usage:

int main() {
    // 执行程序逻辑
    // ...

    return 0;
}

In the

main function, return 0 means the program has been executed successfully, No problems encountered.

Return other values:

In addition to 0, the

main function can also return other integer values, representing different error codes or status information. For example:

1: General error
• 2: Memory allocation failed
• 3: File opening failed

Advantages ：

Using

return 0 as the return value of the success status has the following advantages:

Unification: Provides one for all normal program execution Standard return value.
• Easy to debug: A value of 0 makes it easy to identify that the program executed successfully.
• Concise code:
• return 0; is a concise and clear way to end the program.

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