Can a Python function return None?

Functions without a return statement known as void functions return None from the function. To return a value other than None, you need to use a return statement in the functions; and such functions are called fruitful functions.

How do I stop Python from returning None?

Your options are:

1. return something else if the condition is not met.
2. ignore the function if it returns None.

What happens if a function returns nothing Python?

There is no such thing as “returning nothing” in Python. Every function returns some value (unless it raises an exception). If no explicit return statement is used, Python treats it as returning None .

Why return does not work in Python?

TLDR: A return value must be assigned to something at the call site. Functions in Python have their own scope. It is created on entering (calling) the function, and destroyed when leaving it. Assignment to a name inside a scope makes that name local to this scope – causing it to be destroyed along with the scope.

What happens when a function doesn’t have 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. If a return value isn’t required, declare the function to have void return type.

Does a function have to return something?

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.

What is return in Python?

A return statement is used to end the execution of the function call and “returns” the result (value of the expression following the return keyword) to the caller. The statements after the return statements are not executed. Note: Return statement can not be used outside the function.

Can you return pass in Python?

pass is an “empty” command, but return stops the function / method. All functions/methods/callables in Python return None in the end, unless you manually return any other value, of course. You could imagine that every function has an implicit return None statement after all of your custom code.

How do you know when a function returns none in Python?

In Python, every function returns something. If there are no return statements, then it returns None. If the return statement contains an expression, it’s evaluated first and then the value is returned. The return statement terminates the function execution.

Can a function not return a value?

Void functions are created and used just like value-returning functions except they do not return a value after the function executes. 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.

How does return in Python work?

A return statement is used to end the execution of the function call and “returns” the result (value of the expression following the return keyword) to the caller. The statements after the return statements are not executed. If the return statement is without any expression, then the special value None is returned.

Does a function have to have 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. However, there will be a value of None which is implicitly returned by Python.

What does return with nothing mean in Python?

In Python, every function returns something. If there are no return statements, then it returns None. If the return statement contains an expression, it’s evaluated first and then the value is returned.

Why does Python print return none?

Every function returns something in Python. If you don’t explicitly return a value, Python has your function return None. Your function doesn’t actually return anything because print prints to stdout, while return actually returns a value. They may look the same in the REPL, but they’re completely different.

What is return none in Python?

Often in Python, functions which return None are used like void functions in C — Their purpose is generally to operate on the input arguments in place (unless you’re using global data (shudders)). Returning None usually makes it more explicit that the arguments were mutated.

What is nonetype in Python?

NoneType in Python is the data type of the object when the object does not have any value. You can initiate the NoneType object using keyword None as follows.