Understandingwhileloops is essential for Python developers, as they let you handle tasks that require repeated execution based on conditions. In this tutorial, you’ve learned how to: Understand thesyntaxof Pythonwhileloops Repeattasks when acondition is truewithwhileloops ...
A while statement is similar, except that it can be run more than once. The statements inside it are repeatedly executed, as long as the condition holds. Once it evaluates to False, the next section of code is executed. Below is a while loop containing a variable that counts up from 1 ...
whilei <6: i +=1 ifi ==3: continue print(i) Try it Yourself » The else Statement With theelsestatement we can run a block of code once when the condition no longer is true: Example Print a message once the condition is false: ...
from random import randrange in_box = randrange(1, 5) in_box = str(in_box) guess_box = False print("To guess which box enter in the numbers that each box relates to, eg, Box 1 will be the number 1! Ready? Set? Go!") while guess_box != in_box: print(f"I was in box {i...
While loop Loops are used to repeatedly execute a block of program statements. The basic loop structure in Python is while loop. Here is the syntax. Syntax: while (expression) : statement_1 statement_2 ... The while loop runs as long as the expression (condition) evaluates to True and...
Test your understanding of Python while loops.Take this quiz after reading our Python “while” Loops (Indefinite Iteration) tutorial.The quiz contains 9 questions and there is no time limit. You’ll get 1 point for each correct answer. At the end of the quiz, you’ll receive a total ...
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while 循环 在给定的判断条件为 true 时执行循环体,否则退出循环体。 for 循环 重复执行语句 嵌套循环 你可以在while循环体中嵌套for循环 1.2.循环控制语句 循环控制语句可以更改语句执行的顺序。Python支持以下循环控制语句: break结束全部循环,跳出整个循环 ...
Sometimes we want a part of the code to keep running, again and again, until we are ready for it to stop. Let’s see how while loops can help us do this! Python While 1 Run the example: In this code, we import time so we can use a “wait” function called ...
Python while loops are also used for unlimited iterations. Some well-known examples are ATMs, the Linux command prompt and the Python Read-Eval-Print loop (REPL). Below we show a sketch of an REPL implementation using an infinite while loop. # Loop while True: # Read user input user_inpu...