導入
の パイソン return ステートメントは、関数から値を返すために使用されます。ユーザーは関数内でのみ return ステートメントを使用できます。 Python関数以外では使用できません。 return ステートメントには、return キーワードとその後に返される値が含まれます。
return ステートメントの構文:
def funtion_name(): statements . . . return [expression]
プログラム1
def adding(x, y): i = x + y return i result = adding(16, 25) print(f'Output of adding(16, 25) function is {result}') 出力
プログラム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('
output of second function is {}'.format(flag)) < pre> <p> <strong>Output.</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-2.webp" alt="Python return statement"> <h3>Returning Multiple Values</h3> <p>In the Python programming language, a user can return multiple values from a function. The following are the various methods for this.</p> <p> <strong>1. Using Object:</strong> This method is similar to <a href="/c-programming-language-tutorial">C</a> / <a href="/c-tutorial">C ++</a> and <a href="/java-tutorial">Java</a> . A user can create a class to hold multiple values in a function and return an object of that class.</p> <pre> class a: def __init__(self): self.omg = 'javatpoint 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) </pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-3.webp" alt="Python return statement"> <p> <strong>2. Using Tuple:</strong> 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.</p> <pre> def test(): omg = 'javatpoint 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) </pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-4.webp" alt="Python return statement"> <p> <strong>3. Using list:</strong> The list is similar to the dynamically sized array. In the list, the user can store everything in a single variable.</p> <pre> def test(): omg = 'javatpoint' i = 122 return [omg, i]; # Driver code to test the above method list = test() print(list) </pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-5.webp" alt="Python return statement"> <p> <strong>4. Using dictionary:</strong> In the Python language, a dictionary is a collection of unstructured items that are used to store data values such as hash or map.</p> <pre> def test(): a = dict(); a['omg'] = 'javatpoint' a['i'] = 122 return a # Driver code to test the above method a = test() print(a) </pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-6.webp" alt="Python return statement"> <p> <strong>5. Using Data Class (Python 3.7+)</strong> </p> <pre> 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) </pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-7.webp" alt="Python return statement"> <h3>Function returning another function</h3> <p>In the Python programming language, a function is in the form of an object. Therefore, the user can return a function from another function.</p> <p>In the below program, The first_add function returns the second_add function.</p> <pre> 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('
The value of x * y is', z(10)) </pre> <p> <strong>Output</strong> </p> <img src="//techcodeview.com/img/python-tutorial/18/python-return-statement-8.webp" alt="Python return statement"> <hr></5)> 出力
Javaの数学
2. タプルの使用: タプルはリストに似ていますが、タプルとリストには若干の違いがあります。タプルではオブジェクトの値を変更できませんが、リストではオブジェクトの値を変更できます。
def test(): omg = 'javatpoint 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)
出力
3. リストの使用: このリストは、動的にサイズ変更される配列に似ています。リストでは、ユーザーはすべてを 1 つの変数に保存できます。
def test(): omg = 'javatpoint' i = 122 return [omg, i]; # Driver code to test the above method list = test() print(list)
出力
Java優先キュー
4. 辞書の使用: Python 言語では、辞書は、ハッシュやマップなどのデータ値を格納するために使用される非構造化アイテムのコレクションです。
def test(): a = dict(); a['omg'] = 'javatpoint' a['i'] = 122 return a # Driver code to test the above method a = test() print(a)
出力
5. データ クラスの使用 (Python 3.7 以降)
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)
出力
別の関数を返す関数
Python プログラミング言語では、関数はオブジェクトの形式です。したがって、ユーザーは別の関数から関数を返すことができます。
以下のプログラムでは、first_add 関数は Second_add 関数を返します。
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(' The value of x * y is', z(10))
出力
