What does a void method return in Java?
Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so. … The data type of the return value must match the method’s declared return type; you can’t return an integer value from a method declared to return a boolean.
Does void return NULL Java?
void is a keyword that means that a function does not result a value. java. lang. … As a result type (a function with a return value of type Void ) it means that the function *always * return null (it cannot return anything other than null , because Void has no instances).
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 is void in Java?
void is a Java keyword. Used at method declaration and definition to specify that the method does not return any type, the method returns void .
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.
Can we return null in Java?
You could change the method return type to return java. lang. Integer and then you can return null, and existing code that returns int will get autoboxed. Nulls are assigned only to reference types, it means the reference doesn’t point to anything.
Is void a return type?
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.
Is void necessary in Java?
So Void is not needed there.
Does void method return null?
Its purpose is simply to represent the void return type as a class and contain a Class<Void> public value. … Therefore, the only value we can assign to a Void variable is null.
Why is void a return type?
The void type, in several programming languages derived from C and Algol68, is the type for the result of a function that returns normally, but does not provide a result value to its caller. Usually such functions are called for their side effects, such as performing some task or writing to their output parameters.
How do you 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 return a value from a void function?
A void function cannot return any values. But we can use the return statement. It indicates that the function is terminated.