What Happens If You Forget The Return Statement In A Non Void Function?

Is it compulsory to have one return statement in a function?

Structured programming says you should only ever have one return statement per function.

This is to limit the complexity.

Many people such as Martin Fowler argue that it is simpler to write functions with multiple return statements..

How do you end a void function?

4 Answers. Use a return statement! if (condition) return; You don’t need to (and can’t) specify any values, if your method returns void .

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.

Can the return type of the main function be in?

You can write the main method in your program with return type other than void, the program gets compiled without compilation errors. But, at the time of execution JVM does not consider this new method (with return type other than void) as the entry point of the program.

Should I return null or undefined?

Undefined typically refers to something which has not yet been assigned a value (yet). Null refers to something which definitively has no value. In that case, I would recommend returning a null. Note that a function with no specified return value implicitly returns undefined.

Can a void function return null?

You can’t return NULL in a void function,because NULL is defined by #define NULL 0 in C++,(return 0 or NULL means that you return a value that is int or other type) void function means that it have no return value,you can write code: return; to exit a void function.

Why is there a class object to represent void even though there is no void type?

The Void class according to javadoc exists because of the fact that some time we may need to represent the void keyword as an object. But at the same point we cannot create an instance of the Void class using the new operator. This is because the constructor in Void has been declared as private.

Can we write a program without main ()?

The answer is yes. We can write program, that has no main() function. In many places, we have seen that the main() is the entry point of a program execution. … So the system at first calls the _start(), this sets up the environment, then main is called.

Can you use return in a void function?

Void functions are created and used just like value-returning functions except they do not return a value after the function executes. … You may or may not use the return statement, as there is no return value. Even without the return statement, control will return to the caller automatically at the end of the function.

Does return type void?

______________ have the return type void. Explanation: Constructor creates an Object and Destructor destroys the object. They are not supposed to return anything, not even void. … Explanation: There are no void objects.

What does the return 0 statement in main function indicate?

The return value of the main function is considered the “Exit Status” of the application. On most operating systems returning 0 is a success status like saying “The program worked fine”. In C++ it is optional to type ” return 0; ” at the end of the main function and the compiler includes it automatically.

What is returned by functions that don’t have a return statement?

A function without an explicit return statement returns None . In the case of no arguments and no return value, the definition is very simple. Calling the function is performed by using the call operator () after the name of the function.

Can a function have more than one return statement?

A function can have multiple return statements. When any of them is executed, the function terminates. A function can return multiple types of values.

What is the difference between return 0 and return 1?

So when you return 1, you are basically returning True as the final value of the function while return 0 is basically returning False as the final value of the function.

What does it mean when a function does not return a value?

If no return statement appears in a function definition, control automatically returns to the calling function after the last statement of the called function is executed. In this case, the return value of the called function is undefined.