difference between int main() and int main(void)

Difference between int main() and int main(void) in C

In C programming, the main function is the entry point of a program. It is where the execution of the program begins. The main function can be declared in two different ways: int main() and int main(void).

The difference between int main() and int main(void) lies in the function parameter list.

• int main(): This declaration of the main function does not specify any parameters. It indicates that the main function can accept any number of arguments or no arguments at all. This is an older style of declaring the main function and is still supported in modern C compilers. However, it is considered a bad practice because it does not convey the intention of the programmer clearly. It is recommended to use int main(void) instead.

• int main(void): This declaration of the main function explicitly specifies that it does not accept any arguments. It indicates that the main function does not expect any command-line arguments to be passed to the program. This is the preferred and recommended way of declaring the main function in modern C programming.

It is important to note that both int main() and int main(void) have the same return type of int, which indicates the exit status of the program.

Here is an example of the int main(void) declaration:

#include <stdio.h>

int main(void) {
    printf("Hello, world!\n");
    return 0;
}

In this example, the main function does not accept any arguments and simply prints "Hello, world!" to the console. The program then returns 0, indicating successful execution.

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