What is a while loop in Python? Learn about the syntax of the while loop with examples. Understand the differences between the while loop and for loop. Updated: 11/21/2023 Table of Contents While Loops in Python Examples of While Loop in Python Infinite Loop For Loop Vs While Loop ...
For example, say that you want to implement a number-guessing game. You can do this with awhileloop: Pythonguess.py fromrandomimportrandintLOW,HIGH=1,10secret_number=randint(LOW,HIGH)clue=""# Game loopwhileTrue:guess=input(f"Guess a number between{LOW}and{HIGH}{clue}")number=int(guess...
Assignment expressions can simplify these kinds of loops. In this example, you can now put the check back together with while where it makes more sense: Python walrus_quiz.py # ... while (user_answer := input(f"\n{question} ")) not in valid_answers: print(f"Please answer one of ...
其原因是 3.x 版本并不完全向后兼容早期版本,而且由于目前每天都在使用大量的现有代码和库,这两个版本都是可用的。你可以在 www.python.org 找到 Windows、Linux/Unix 和 Mac OS X 操作系统的这些版本。如果您运行的是 Linux,您可以检查您的正态分布,它将有一个可用的 Python 版本。它可能已经安装在您的系统...
Assignments change a variable while mutations change a value (see The 2 types of "change" in Python). Assignments don't usually cause mutations (see Mutating with an assignment statement and Augmented assignments mutate). We usually think of the = sign when we think of assignment. But for l...
|and|continue|finally|is|raise| |as|def|for|lambda|return| |assert|del|from|None|True| |async|elif|global|nonlocal|try| |await|else|if|not|while| |break|except|import|or|with| |class|False|in|pass|yield| 请注意,Python 关键字始终是英语,在其他语言中不可用。例如,下面的函数具有用西班牙语...
while True: # Main program loop. print('\n\n\n\n\n') # Separate each step with newlines. currentCells = copy.deepcopy(nextCells) 我们主程序循环的每一次迭代都将是我们细胞自动机的一个单独的步骤。在每一步中,我们将复制nextCells到currentCells,在屏幕上打印currentCells,然后使用currentCells中的...
python是一个高层次的结合了解释性、编译型、互动性和面向对象型的脚本语言。 解析型语言意味着python没有了像C语言编译这样的环节。类似于php。 交互式语言意味着可以在一个python提示符>>>下执行代码。 面向对象语言意味着支持python支持面向对象将代码封装在对象的编程技术。
Whereas a for loop can be constructed using a while loop, a while loop cannot be constructed using a for loop. Let’s look at a few examples. Below we’ll use a while loop to recreate the functionality of a typical for loop with a numerical loop variable. To do this, we’ll define...
While Loop: A while loop continues executing as long as the specified condition is true. It’s useful when the number of iterations is not known in advance. Python Copy Code Run Code 1 2 3 4 5 6 count = 0 while count < 5: print(count) count += 1 Nested For-Loop in Python:...