Does a JavaScript function need a return statement?

Every function in JavaScript is a Function object. See Function for information on properties and methods of Function objects. To return a value other than the default, a function must have a return statement that specifies the value to return. A function without a return statement will return a default value.

Does a JavaScript function need return?

No; Javascript functions are not required to return a value. If you call a function that doesn’t return a value, you’ll get undefined as the return value.

Does a function need a return statement?

NO, a function does not always have to have an explicit return statement. If the function doesn’t need to provide any results to the calling point, then the return is not needed.

Can you have a function without a return statement?

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.

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What happens when JavaScript function reaches a return statement?

A return statement determines the value the function returns. When control comes across such a statement, it immediately jumps out of the current function and gives the returned value to the code that called the function. A return keyword without an expression after it will cause the function to return undefined .

How do you call a return function in JavaScript?

When a return statement is used in a function body, the execution of the function is stopped. If specified, a given value is returned to the function caller. For example, the following function returns the square of its argument, x , where x is a number. If the value is omitted, undefined is returned instead.

How many return statements are allowed in a function procedure?

Any number of ‘return’ statements are allowed in a function definition but only one of them is executed at run time.

What will happen if a return statement does not have an associated expression?

What will happen if a return statement does not have an associated expression? Explanation: A function without a return statement will return a default value. If the return statement does not have an associated expression then it returns an undefined value.

Should a function always return something Python?

A Python function will always have a return value. There is no notion of procedure or routine in Python. So, if you don’t explicitly use a return value in a return statement, or if you totally omit the return statement, then Python will implicitly return a default value for you.

What is the default return value of a function without 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.

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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. … It causes the method to end execution and it returns a value to the statement that called the method.

What is a void function in Python?

In Python, it is possible to compose a function without a return statement. Functions like this are called void, and they return None, Python’s special object for “nothing”. Here’s an example of a void function: … Now, since get_ing() returns a value, it can be scooped into a variable via an assignment statement.

What is the purpose of a return statement in a function Codehs?

The return statement exits a method and returns a value. Methods can return many different types of results, such as Strings, ints, doubles, and more. If no value gets returned from a method, the method return type is void .

What is a function argument JavaScript?

Arguments are Passed by Value

The parameters, in a function call, are the function’s arguments. JavaScript arguments are passed by value: The function only gets to know the values, not the argument’s locations. If a function changes an argument’s value, it does not change the parameter’s original value.

What is a function JavaScript?

A JavaScript function is a block of code designed to perform a particular task. A JavaScript function is executed when “something” invokes it (calls it).

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