What happens if function has no return?

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What happens if function has no return?

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.

How do you return a NULL value in 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 .

What does empty return do in Python?

It means it will return None . You could remove the return and it would still return None because all functions that don’t specify a return value in python will by default return None .

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What does a function return if it has no return statement in it in python?

If there is no return statement in the function code, the function ends, when the control flow reaches the end of the function body and the value None will be returned.

How do you return something 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. If the return statement is without any expression, then the special value None is returned.

How do you return an empty string in Python?

Use “” to create an empty string Assign “” to a variable to initialize an empty string.

How do I remove a value from a list in Python?

Remove NaN From List in Python

  1. Remove NaN From the List in Python Using the math.isnan() Method.
  2. Remove NaN From the List in Python Using the numpy.isnan() Method.
  3. Remove NaN From the List of Strings in Python.
  4. Remove NaN From the List in Python Using the pandas.isnull() Method.
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How do you return a function in Python?

Does Python need return?

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 happens if return statement is not executed in Python?

The statements after the return statements are not executed. If the return statement is without any expression, then the special value None is returned. Note: Return statement can not be used outside the function. In Python, we can return multiple values from a function.

How to use funfunctions in Python?

Functions in Python are created using the def keyword, followed by a function name and function parameters inside parentheses. A function always returns a value,The return keyword is used by the function to return a value, if you don’t want to return any value, the default value None will returned.

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What is the default return value of a function in 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. That default return value will always be None.

How to get the value of a variable in Python if not none?

Python One Line If Not None. To assign the result of a function get_value () to variable x if it is different from None, use the Walrus operator if tmp := get_value (): x = tmp within a single-line if block. The Walrus operator assigns the function’s return value to the variable tmp and returns it at the same time,