Can a constructor return a value?

No, constructor does not return any value. While declaring a constructor you will not have anything like return type. In general, Constructor is implicitly called at the time of instantiation. And it is not a method, its sole purpose is to initialize the instance variables.

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.

Which type of value can be returned from a constructor?

Constructors do not return any type while method(s) have the return type or void if does not return any value. Constructors are called only once at the time of Object creation while method(s) can be called any number of times.

Do constructors return values C++?

Constructors are used to construct an object, do all the work necessary to allow it to do the things you want it to do. They do not return a value.

Can constructor return a value in Python?

Constructor Return Value

Thus, it has the sole purpose of initializing the instance variables. The __init__() is required to return None. We can not return something else. If we try to return a non-None value from the __init__() method, it will raise TypeError.

Does constructor return any value?Is constructor inherited?Can you make a constructor final?

Can a constructor return a void?

Constructor is not like any ordinary method or function, it has no return type, thus it does not return void. Constructors don't create objects.

Can you return in __ init __?

__init__ doesn't return anything and should always return None .

Can constructors be static?

Java constructor can not be static

One of the important property of java constructor is that it can not be static. We know static keyword belongs to a class rather than the object of a class. A constructor is called when an object of a class is created, so no use of the static constructor.

Can a destructor return a value?

Declaring destructors

Do not return a value (or void ). Cannot be declared as const , volatile , or static . However, they can be invoked for the destruction of objects declared as const , volatile , or static .

Can a constructor be private?

Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.

Does constructor return type?

No, constructor does not have any return type in Java. Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. Mostly it is used to instantiate the instance variables of a class.

Can we inherit a constructor?

Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.

Can a constructor be overloaded?

Constructors can be overloaded in a similar way as function overloading. Overloaded constructors have the same name (name of the class) but the different number of arguments. Depending upon the number and type of arguments passed, the corresponding constructor is called.

Why can't a constructor be final?

The child class inherits all the members of the superclass except the constructors. In other words, constructors cannot be inherited in Java therefore you cannot override constructors. So, writing final before constructors makes no sense. Therefore, java does not allow final keyword before a constructor.

What would happen if a constructor has a return type?

Explanation: The constructor cannot have a return type. It should create and return new object. Hence it would give compilation error.

What is difference between constructor and destructor?

Constructor helps to initialize the object of a class. Whereas destructor is used to destroy the instances.

Why destructors are called in reverse order?

The destructors are called in exactly the reverse order of the constructors – this is important because of potential dependencies (in the derived-class constructor or destructor, you must be able to assume that the base-class subobject is still available for use, and has already been constructed – or not destroyed yet) ...

What is the return type of constructor in Java?

Therefore, the return type of a constructor in Java and JVM is void.

Can a constructor be virtual?

Constructor can not be virtual, because when constructor of a class is executed there is no vtable in the memory, means no virtual pointer defined yet.

Can constructor be overridden?

Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. But, a constructor cannot be overridden. If you try to write a super class's constructor in the sub class compiler treats it as a method and expects a return type and generates a compile time error.

Can we make a constructor abstract?

Yes! Abstract classes can have constructors! Yes, when we define a class to be an Abstract Class it cannot be instantiated but that does not mean an Abstract class cannot have a constructor. Each abstract class must have a concrete subclass which will implement the abstract methods of that abstract class.

Can a class return a value Python?

You can use any Python object as a return value. Since everything in Python is an object, you can return strings, lists, tuples, dictionaries, functions, classes, instances, user-defined objects, and even modules or packages.

What does constructor return in Python?

Constructors are generally used for instantiating an object. The task of constructors is to initialize(assign values) to the data members of the class when an object of the class is created. In Python the __init__() method is called the constructor and is always called when an object is created.

Does init return None?

1 Answer. __init__ is required to return None. You cannot return something else.