What is the difference between return 0 and return in C?

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. return 1 means that the user-defined function is returning true.

What happens if you don’t write return 0 in C?

If a function is declared as returning a type other than void , then it must have a return statement. The only exception to this is the main function, which as of C99, can omit the return statement (when it is omitted, the behaviour is the same as if there was a return 0; statement before the closing } of main ).

How do you return a void?

Return from void functions in C++

1. A void function can do return. We can simply write return statement in a void fun().
2. A void fun() can return another void function.
3. A void() can return a void value. A void() cannot return a value that can be used.

What does it mean when a function returns a void value?

When void is used as a function return type,it indicates that the function does not return a value. When void appears in a pointer declaration,it specifies that the pointer is universal. When used in a function’s parameter list , void indicates that the function takes no parameters. For E.g. a function that prints a message does not return a value.

What is the difference between Exit(0) and return(0)?

in main function return 0 or exit(0) are same but if you write exit(0) in different function then you program will exit from that position. returning different values like return 1 or return -1 means that program is returning error .

What is the difference between int main (void) and main (int)?

So, the preferred form to use is int main (void) if main is not taking any argument. Like any other function, main is also a function but with a special characteristic that the program execution always starts from the ‘main’. ‘int’ and ‘void’ are its return type. So, let’s discuss all of the three one by one.

What does return 0 mean in C++?

returning different values like return 1 or return -1 means that program is returning error . When exit (0) is used to exit from program, destructors for locally scoped non-static objects are not called. But destructors are called if return 0 is used.