What does void return in Java?
A void return type simply means nothing is returned. System. out. println does not return anything as it simply prints out the string passed to it as a parameter.
Why void does not return any value?
void is a type to represent nothing. That is a subtle difference : the representation is still required, even though it represents nothing. This type is used as function’s return type which returns nothing. This is also used to represent generic data, when it is used as void* .
What happens if you return in a void function?
In lieu of a data type, void functions use the keyword “void.” A void function performs a task, and then control returns back to the caller–but, it does not return a value. You may or may not use the return statement, as there is no return value.
Can you return nothing in a void function?
3 Answers. You can’t return NULL in a void function,because NULL is defined by #define NULL 0 in C++,(return 0 or NULL means that you return a value that is int or other type) void function means that it have no return value,you can write code: return; to exit a void function.
Why do constructors not return values?
So the reason the constructor doesn’t return a value is because it’s not called directly by your code, it’s called by the memory allocation and object initialization code in the runtime. Its return value (if it actually has one when compiled down to machine code) is opaque to the user – therefore, you can’t specify it.
What is the difference between a void method and a value returning method?
A void method is one that simply performs a task and then terminates. A value – returning method not only performs a task but also sends a value back to the code that called it.
What does it mean to return void?
In computer programming, when void is used as a function return type, it indicates that the function does not return a value. … When used in a function’s parameter list, void indicates that the function takes no parameters.
What does it mean that a function does not return a value?
It means that that function does not return a value to the caller explicitly.
Does return type void?
______________ have the return type void. Explanation: Constructor creates an Object and Destructor destroys the object. They are not supposed to return anything, not even void. … Explanation: void fundamental type is used in the cases of a and c.
Is return in void good practice?
If the method is returning a value only to indicate an incorrect state/exception, then it should be returning “void”. The Exception should take care of handling all the error scenarios rather than a say a “boolean” return value.
How do I return in void?
Some of cases are listed below.
- A void function can do return. We can simply write return statement in a void fun(). …
- A void fun() can return another void function.
- A void() can return a void value. A void() cannot return a value that can be used.
How do you stop a void function?
Use return; instead of return(0); to exit a void function.