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Can constructor return a value?

Can 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.

Can constructor return a value in C?

Constructor does not returns any value because constructor by default return a newly created instance and moreover you are not calling constructor specificlly it means the constructor automatically called when you creating the object so due to it called at the time of object creation it main responsibility is to …

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.

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 .

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 constructor return a value in C++?

You do not specify a return type for a constructor. A return statement in the body of a constructor cannot have a return value.

Can constructor be static?

A static constructor is used to initialize any static data, or to perform a particular action that needs to be performed only once. It is called automatically before the first instance is created or any static members are referenced.

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.

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.

Can a constructor be final?

Java constructor can not be final

One of the important property of java constructor is that it can not be final. As we know, constructors are not inherited in java. Therefore, constructors are not subject to hiding or overriding.

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.

Is constructor inherited?

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

How many return statement can be used in a constructor?

A constructor can not explicitly return a value. A constructor already returns reference ID of a created object and constructor itself is a method. A method can not return more than one value.

Can we overload constructor in derived class?

Since the constructors can’t be defined in derived class, it can’t be overloaded too, in derived class.

What does a constructor return?

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.

Is constructor have any return type in Java?

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

Can abstract methods have constructor?

Like any other classes in Java, abstract classes can have constructors even when they are only called from their concrete subclasses.

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.

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.

Does init return None?

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