Question: What is return without value in Java?

What is return without value?

Void (NonValue-Returning) functions: … 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 it possible to return nothing in Java?

In Java, a null value can be assigned to an object reference of any type to indicate that it points to nothing. … In the absence of a constructor, the getArticles() and getName() methods will return a null reference.

What does an empty return statement in Java?

An empty return statement is acceptable within a method with a void return type because it doesn’t return any value. class A { public void message() { System.

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 is returning a value?

A return is a value that a function returns to the calling script or function when it completes its task. A return value can be any one of the four variable types: handle, integer, object, or string.

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Why returning null is bad?

A function that returns a null reference achieves neither goal. Returning null is like throwing a time bomb into the software. Other code must a guard against null with if and else statements. These extra statements add more complexity to the software.

How do you stop returning null in Java?

Another way to avoid returning null is to use a Null object design pattern. A null object is an object without behavior like a stub that a developer can return to the caller instead of returning null value. The caller doesn’t need to check the order for null value because a real but empty Order object is returned.

Should I return null or throw exception?

Only throw an exception if it is truly an error. If it is expected behavior for the object to not exist, return the null. Otherwise it is a matter of preference. As a general rule, if the method should always return an object, then go with the exception.

What is the role of return statement?

A return statement ends the execution of a function, and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return statement can return a value to the calling function.

What is the return type () method?

In computer programming, the return type (or result type) defines and constrains the data type of the value returned from a subroutine or method. In many programming languages (especially statically-typed programming languages such as C, C++, Java) the return type must be explicitly specified when declaring a function.

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What is return in Java with example?

A return statement causes the program control to transfer back to the caller of a method. Every method in Java is declared with a return type and it is mandatory for all java methods. A return type may be a primitive type like int, float, double, a reference type or void type(returns nothing).

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