Why is the main function in C++ an int?

int main – ‘int main’ means that our function needs to return some integer at the end of the execution and we do so by returning 0 at the end of the program. 0 is the standard for the “successful execution of the program”. main – In C89, the unspecified return type defaults to int.

Does main return int in C?

main doesn’t neeed to be a function or return an int, but it usually should because that will become the return code of your program if it exits normally. so you can think of the return value of main being fed as input to the exit function. main() returns the data type it was defined with.

Why do we use int main instead of void Main?

The void main() indicates that the main() function will not return any value, but the int main() indicates that the main() can return integer type data. When our program is simple, and it is not going to terminate before reaching the last line of the code, or the code is error free, then we can use the void main().

What does return in C++ do?

The return statement causes execution to jump from the current function to whatever function called the current function. An optional a result (return variable) can be returned. A function may have more than one return statement (but returning the same type).

What does the main () function of C++ return by default?

In C++ language, the main() function can be left without return value. By default, it will return zero.

Why main function should return a value?

The return value of main() function shows how the program exited. The normal exit of program is represented by zero return value. If the code has errors, fault etc., it will be terminated by non-zero value.

Can the return type of the main function be in?

You can write the main method in your program with return type other than void, the program gets compiled without compilation errors. But, at the time of execution JVM does not consider this new method (with return type other than void) as the entry point of the program.