Why return type is not allowed in constructor?
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Why return type is not allowed in constructor?
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 I use return statement in constructor?
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 constructors do not have any return type explain it with proper example?
Constructor is internally a nonstatic method with name and void return type. It does not return anything. Internally first object is allocated and then its constructor is called. Object is not allocated with constructor itself.
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 type of constructor Cannot have a return type?
Discussion Forum
| Que. | Which type of constructor can’t have a return type? |
|---|---|
| b. | Parameterized |
| c. | Copy |
| d. | Constructors don’t have a return type |
| Answer:Constructors don’t have a return type |
Do constructors have a return type?
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 time.
How many return statements can be used in a constructor?
In constructor you can only write return to stop execution. You can’t write return with some value.
What is return type of constructor?
A constructor doesn’t have any return type. A constructor doesn’t return any values explicitly, it returns the instance of the class to which it belongs. …
Which does not have a return type?
Answer: Void functions are created and used just like value-returning functionsexcept they do not return a value afterthe function executes. In lieu of a datatype, 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.
Which constructor Cannot have a return type?
When you write a constructor what return type do you write in constructor declaration explain it?
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. If the programmer doesn’t write a constructor the compiler writes a constructors on his behalf.
Which type of constructor cant have a return type?
Why can’t I return a value from a constructor?
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 return type of @constructor in Java?
Constructor is internally a nonstatic method with name and void return type. It does not return anything. Internally first object is allocated and then its constructor is called. Object is not allocated with constructor itself.
What is the return type of a void constructor?
12No return type (not even void) shall be specified for a constructor. A return statement in the body of a constructor shall not specify a return value. Note, BTW, that in C++ it is legal to use returnwith an argument in a void function, as long as the argument of returnhas type void
What is anconstructor in C++?
Constructors are functions that do not return a value. The family of functions that do not return a value consists of: void functions, constructors and destructors. It is stated in 6.6.3/2 in the C++ standard. The very same 6.6.3/2 states that it is illegal to use return with an argument in a function that does not return a value.