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[#]: subject: "Input Function in Python: Concepts and Examples"
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[#]: via: "https://www.debugpoint.com/input-function-python/"
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[#]: author: "Arindam https://www.debugpoint.com/author/admin1/"
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[#]: collector: "lkxed"
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[#]: translator: "geekpi"
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[#]: reviewer: " "
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[#]: publisher: " "
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[#]: url: " "
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Input Function in Python: Concepts and Examples
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======
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**In this article, I will explain the basics of the Input function of Python with some easy-to-understand examples.**
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![][1]
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Python is one of the most popular programming languages in the world, and it is widely used in various applications. One of the basic concepts in Python is the `Input()` function, which allows users to interact with the program by providing input values.
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Let’s find out the input function, how it works, and how you can use it effectively in your Python programs.
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Before you start, I hope you have Python installed and set up a basic editor. If not, do refer to my below guides:
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- [How to Install Python 3.11 on Ubuntu/Linux][2]
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- [How to install Python on Windows][3]
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- [How to set up the IDLE editor for Python][4]
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### Python Input Function
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The input function in Python is used to accept user input as a string. It prompts the user to enter a value and waits for the user to provide input. The user’s input is then stored as a string in a variable, which can be used later in the program.
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#### Syntax
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```
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input("your message to user")
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```
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When you run the input function, it shows the message to the user and _waits_ for input. The cursor waits. Once the user enters input and presses enter, the input function reads the user’s input. The value is stored in the variable you specify.
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Let’s see a few examples.
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### Example 1: Simple Input function usage
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The following code snippet takes input and shows the output with an additional string.
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```
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your_name = input("Enter your name:")print("Hello " + your_name)
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```
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**Output:**
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```
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Enter your name:arindamHello arindam
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```
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![Python Input function - a simple example][5]
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Example 2: Taking input as integer and float
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You can also convert the input as int() or float() at runtime while using input() function. Here is an example.
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```
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no_of_books = int(input("Enter total books ordered:"))
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print ("Total number of books:", no_of_books)
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price_of_each_book = float(input("Enter unit price:"))
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print ("Total price:", no_of_books * price_of_each_book)
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```
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Output:
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```
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Enter total books ordered:5
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Total number of books: 5
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Enter unit price:10.1
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Total price: 50.5
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```
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### Example 4: Joining lists
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You can also use other functions, such as lists, to accept a set of values and convert them as [lists][6] in Python. Here’s an example which takes input and converts it to a list. Then used, another set of values and appended to the first list.
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```
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# take input for first list
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list_1 = list(input("Enter numbers for list 1:"))
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#take input for second list
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list_2 = list(input("Enter some letters for list 2:"))
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#loop through the second list and add to first list
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for j in list_2:
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list_1.append(j)
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#print the modified first list
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print(list_1)
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```
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**Output:**
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```
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Enter numbers for list 1:1234
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Enter some letters for list 2:ABCD
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['1', '2', '3', '4', 'A', 'B', 'C', 'D']
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```
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### Conclusion
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I hope this simple guide clarifies the input() function with several examples. It’s a powerful function to accept values from standard input for simple use cases.
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--------------------------------------------------------------------------------
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via: https://www.debugpoint.com/input-function-python/
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作者：[Arindam][a]
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选题：[lkxed][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.debugpoint.com/author/admin1/
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[b]: https://github.com/lkxed/
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[1]: https://www.debugpoint.com/wp-content/uploads/2023/03/pyinput.jpg
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[2]: https://www.debugpoint.com/install-python-3-11-ubuntu/
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[3]: https://www.debugpoint.com/install-python-windows/
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[4]: https://www.debugpoint.com/install-idle-ubuntu-linux/
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[5]: https://www.debugpoint.com/wp-content/uploads/2023/03/Python-Input-function-a-simple-example.jpg
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[6]: https://docs.python.org/3/library/stdtypes.html?highlight=list#lists
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@ -0,0 +1,129 @@
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[#]: subject: "Input Function in Python: Concepts and Examples"
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[#]: via: "https://www.debugpoint.com/input-function-python/"
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[#]: author: "Arindam https://www.debugpoint.com/author/admin1/"
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[#]: collector: "lkxed"
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[#]: translator: "geekpi"
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[#]: reviewer: " "
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[#]: publisher: " "
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[#]: url: " "
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Python 中的输入函数：概念和示例
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======
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**在这篇文章中，我将通过一些通俗易懂的例子来解释 Python 的 Input 函数的基础知识。**
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![][1]
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Python 是世界上最流行的编程语言之一，广泛应用于各种应用程序中。Python 中的一个基本概念是 `Input()` 函数，它允许用户通过提供输入值与程序进行交互。
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让我们看看 input 函数它是如何工作的，以及如何在 Python 程序中有效地使用它。
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在开始之前，我希望你已经安装了 Python 并设置了一个基本的编辑器。如果没有，请参考我的以下指南：
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- [如何在 Ubuntu/Linux 上安装 Python 3.11][2]
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- [如何在 Windows 上安装 Python][3]
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- [如何为 Python 设置 IDLE 编辑器][4]
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### Python Input 函数
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Python 中的 input 函数用于接受用户输入的字符串。它提示用户输入一个值并等待用户提供输入。然后将用户的输入作为字符串存储在变量中，稍后可以在程序中使用。
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#### 句法
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```
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input("your message to user")
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```
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当你运行 input 函数时，它会向用户显示消息并_等待_输入。光标等待。当用户输入并按下回车键，input 函数就会读取用户的输入。该值存储在你指定的变量中。
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让我们看几个例子。
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### 示例 1：简单的 input 函数用法
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以下代码片段接受输入并显示带有附加字符串的输出。
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```
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your_name = input("Enter your name:")
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print("Hello " + your_name)
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```
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**输出：**
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```
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Enter your name:arindamHello arindam
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```
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![Python 输入函数：一个简单的例子][5]
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### 示例 2：以整数和浮点数作为输入
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在使用 input() 函数时，你还可以在运行时将输入转换为 int() 或 float() 。这是一个例子。
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```
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no_of_books = int(input("Enter total books ordered:"))
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print ("Total number of books:", no_of_books)
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price_of_each_book = float(input("Enter unit price:"))
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print ("Total price:", no_of_books * price_of_each_book)
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```
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输出：
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```
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Enter total books ordered:5
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Total number of books: 5
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Enter unit price:10.1
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Total price: 50.5
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```
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### 示例 3：连接列表
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你还可以使用其他函数（例如列表）来接受一组值并将它们转换为 Python 中的 [list][6]。这是一个接受输入并将其转换为列表的示例。然后使用另一组值并附加到第一个列表。
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```
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# 获取第一个列表的输入
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list_1 = list(input("Enter numbers for list 1:"))
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# 获取第二个列表的输入
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list_2 = list(input("Enter some letters for list 2:"))
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# 循环遍历第二个列表并添加到第一个列表
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for j in list_2:
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list_1.append(j)
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# 打印修改后的第一个列表
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print(list_1)
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```
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**输出：**
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```
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Enter numbers for list 1:1234
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Enter some letters for list 2:ABCD
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['1', '2', '3', '4', 'A', 'B', 'C', 'D']
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```
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### 总结
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我希望这个简单的指南通过几个示例阐明了 input() 函数。对于简单的场景，它是一个强大的功能，可以从标准输入中接受值。
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--------------------------------------------------------------------------------
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via: https://www.debugpoint.com/input-function-python/
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作者：[Arindam][a]
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选题：[lkxed][b]
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.debugpoint.com/author/admin1/
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[b]: https://github.com/lkxed/
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[1]: https://www.debugpoint.com/wp-content/uploads/2023/03/pyinput.jpg
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[2]: https://www.debugpoint.com/install-python-3-11-ubuntu/
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[3]: https://www.debugpoint.com/install-python-windows/
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[4]: https://www.debugpoint.com/install-idle-ubuntu-linux/
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[5]: https://www.debugpoint.com/wp-content/uploads/2023/03/Python-Input-function-a-simple-example.jpg
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[6]: https://docs.python.org/3/library/stdtypes.html?highlight=list#lists
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