3.2 循环语句(Looping Statements) Python中最常用的循环语句有两种:While和For。除此之外还有文件迭代器(File Iterator),列表解析式(List Comprehension)等循环工具,不过对网工来说,用得最多的还是While和For,因此本文将只讲解这两个循环语句。 3.2.1 While语句 在Python中,while语句用于循环执行一段程序,它和if语...
which helps to simplify complex problems and avoid repetitive code. There are three types of looping Statements in Python: for loop, while loop, and nested loop, each with its unique features and applications. We have
Python programming offers two kinds of loop, thefor loopand thewhile loop. Using these loops along with loop control statements likebreak and continue, we can create various forms of loop. The infinite loop We can create an infinite loop using while statement. If the condition of while loop ...
To forcibly break out of an infinite loop in a Python program, enter Ctrl-C. This only works when running in interactive mode or running a Python program from the command line. The syntax for a while loop is structured as follows: while (Boolean_expression): statements In this example, ...
Python modules are libraries of code and you can import Python modules using the import statements. 让我们从一个简单的案例开始。 Let’s start with a simple case. 我们将通过说“导入数学”来导入数学模块。 We’re going to import the math module by saying "import math". 该模块具有多个功能。
In this section, we will see how loops work in python. Looping is simply a functionality that is commonly used in programming for achieving repetitive tasks. It can vary from iterating each element of an array or strings, to modifying a whole database. ...
After importing concurrent.futures, you just changed from looping through the numbers to creating a thread pool and using its .map() method to send individual numbers to worker threads as they become free. This was just what you did for the I/O-bound multi-threaded code, but here, you ...
Booleans are often returned when using comparison operations, like equality (==). See Boolean operators in Python, if statements in Python and Boolean operators for more on Booleans. Integer (a.k.a. int) Integers are used for representing whole numbers in Python. The numbers 5, 0, and -...
if condition: block of statements else: block of statements Example: Print all even and odd numbers In this program, for loop statement first iterates all the elements from 0 to 20. Next, The if statement checks whether the current number is even or not. If yes, it prints it. Else, ...
4.1. if Statements if语句 4.2. for Statements 4.3. The range() Function range() and len() 组合迭代索引:逐一访问 4.4. break and continue Statements break 语句跳出最内层的 for 或 while 循环;continue 语句继续执行循环的下一次迭代 4.5. 循环中的 else 子句 ...