What is main void?
2 Answers. +1. The first void means that the main function returns no value. The second void in parenthesis (void) means that the main function accepts no arguments. The return type of main is mandated by standards to be of return type int in a hosted environment.
Is it fine to write void main () or main () in C?
Even if your compiler accepts “void main()” avoid it, or risk being considered ignorant by C and C++ programmers. It is never a good idea to use “void main()” or just “main()” as it doesn’t confirm standards. It may be allowed by some compilers though.
What is the difference between int and void in Java?
void methods do not return anything – they simply perform an action. int methods on the other hand, as the name suggests, return an integer value.
Can we use main () instead of int main ()?
It is okay to use main() instead of int main() in C but this is an outdated practice.
Why we use void main in Java?
The main() method is static so that JVM can invoke it without instantiating the class. Void: It is a keyword and used to specify that a method doesn’t return anything. As main() method doesn’t return anything, its return type is void. As soon as the main() method terminates, the java program terminates too.
Why void main is wrong?
Therefore, the designers could choose void main() and require the use of System. exit() for non-zero exit codes. So, the thing that would be “wrong” with choosing void main() for the C++ standard would be that it would break existing code that expected to use return and an exit code value from main() .
What is the difference between return type void and int?
You return void to indicate that nothing is returned. An int return may or may not indicate that calculations have been performed (e.g. could just be a return code). Both have the same behavior and no warning is displayed.
What is the difference between static and void in Java?
static means that the method is associated with the class, not a specific instance (object) of that class. This means that you can call a static method without creating an object of the class. void means that the method has no return value.
Why static is used in main method?
The main() method is static so that JVM can invoke it without instantiating the class. This also saves the unnecessary wastage of memory which would have been used by the object declared only for calling the main() method by the JVM.
Is void main correct in C?
No. It’s non-standard. The standard prototype of main is int main() with the optional command line arguments argc and argv . The int returned by main() is a way for a program to return a value to the system that invokes it.
What’s the difference between int main and int void in C?
In C++, both fun() and fun(void) are same. So the difference is, in C, int main() can be called with any number of arguments, but int main(void) can only be called without any argument. Although it doesn’t make any difference most of the times, using “int main(void)” is a recommended practice in C.
Is the argument of void main the same as void main?
Sending argument to such main function will result in error. This function is partially similar to the above function “void main (void)” as the arguments to these two functions are the same (void).
What’s the difference between void and nothing in Java?
The return type of this main function is same as the one discuss previously i.e. “void” means nothing. The only difference in both these functions is the arguments. You must be wondering that void is nothing and this function should be similar with the previous function because that function also takes nothing as an argument?
What’s the difference between Foo and void in C?
In C++ having a function foo (void) and foo () is the same thing. However, in C it’s different: foo (void) is a function that has no arguments, while foo () is a function with unspecified arguments. In C++, there is no difference, both are same.