what is return 0 in c ?

What is the exact use of return 0 in c programming? When does the 0 goes to or returns to ? What is a calling function? Can some one explain me this with using simple language as I am not familiar with programming?

The statement return 0; is used to indicate that a C program has completed successfully and is ready to exit. When you write a C program, the main function typically has the following structure:

int main() { 
    // Your program code goes here 
    return 0; 
} 

The return 0; statement at the end of the main() function is used to indicate that the program has executed without any errors. The value 0 is then returned to the operating system or the program that called your C program.

Inside the main function:

• return 0: A return 0 means that the program will execute successfully and did what it was intended to do.
• return 1: A return 1 means that there is some error while executing the program, and it is not performing what it was intended to do.

Inside the user-defined function:

• return 0: returning false from a function.
• return 1: returning true from a function.

Conclusion:

Use-case	return 0	return 1
In the main function	return 0 in the main function means that the program executed successfully.	return 1 in the main function means that the program does not execute successfully and there is some error.
In user-defined function	return 0 means that the user-defined function is returning false.	return 1 means that the user-defined function is returning true.