Python return statement

Introduction

The Python return statement is used to return a value from a function. The user can only use the return statement in a function. It cannot be used outside of the Python function. A return statement includes the return keyword and the value that will be returned after that.

Syntax of return statement:

Program 1

  def adding(x, y):      i = x + y      return i  result = adding(16, 25)  print(f’Output of adding(16, 25) function is {result}’)  

Output

Program 2

  def adding(a, b):  # this function is return the value of (a + b)  return a + b  def boolean_function(a):  # this function is return the Boolean value  return bool(a)  # calling function  flag = adding(2, 3)  print(“Output of first function is {}”.format(flag))  flag = boolean_function(9 < 5)  print(“nOutput of second function is {}”.format(flag))  

Output.

Returning Multiple Values

In the Python programming language, a user can return multiple values from a function. The following are the various methods for this.

1. Using Object: This method is similar to C / C ++ and Java. A user can create a class to hold multiple values in a function and return an object of that class.

  class a:  def __init__(self):  self.omg = “tutoraspire is the best website to learn”  self.i = 122  # This function will return an object of the class a  def test():  return a()  # Driver code to test the above method  z = test()  print(z.omg)  print(z.i)  

Output

2. Using Tuple: The tuple is similar to a list, but there is a slight difference between tuple and list. In the tuple, the object values cannot be changed, while the object value can be changed in the list.

  def test():  omg = “tutoraspire is the best website to learn”  i = 122  return omg, i;       # Return tuple, we could also.  # Driver code to test the above method.  omg, i = test()   # Assign return tuple  print(omg)  print(i)  

Output

3. Using list: The list is similar to the dynamically sized array. In the list, the user can store everything in a single variable.

  def test():  omg = “tutoraspire”  i = 122  return [omg, i];  # Driver code to test the above method  list = test()  print(list)  

Output

4. Using dictionary: In the Python language, a dictionary is a collection of unstructured items that are used to store data values such as hash or map.

  def test():  a = dict();  a[‘omg’] = “tutoraspire”  a[‘i’] = 122  return a  # Driver code to test the above method  a = test()  print(a)  

Output

5. Using Data Class (Python 3.7+)

  from dataclasses import dataclass  @dataclass  class Book_list:  bookname: str  cost: float  quantity_of_book_available: int = 0  # This function is used to calculate the total cost of the books  def total_cost_of_book(self) -> float:  return self.cost * self.quantity_of_book_available         book = Book_list(“Python programming language.”, 499, 10)  i = book.total_cost_of_book()  # print the total cost  print(i)  # print the details of the book  print(book)  

Output

Function returning another function

In the Python programming language, a function is in the form of an object. Therefore, the user can return a function from another function.

In the below program, The first_add function returns the second_add function.

  def first_add(x):  def second_add(y):  return x + y  return second_add  i = first_add(20)  print(“The value of x + y is”, i(10))  # second function  def outer_func(x):  return x * 5  def func():  # return the value in the different function  return outer_func  # storing the function in z  z = func()  print(“nThe value of x * y is”, z(10))  

Output

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