解决While loop问题 - Python 当我们在使用while循环时,需要确保循环的终止条件最终会被满足,否则循环将会无限执行下去。通常情况下,我们可以在循环内部修改循环控制变量,使得终止条件得以满足。 1、问题背景 一位开发者在使用 Python 开发一个基于文本的游戏时,遇到了while 循环的问题。他将游戏代码和音频处理代码结合...
Here, the condition of the while loop is alwaysTrue. However, if the user entersend, the loop termiantes because of thebreakstatement. Pythonwhileloop with anelseclause In Python, awhileloop can have an optionalelseclause - that is executed once the loop condition isFalse. For example, coun...
importselect# 创建一个select对象selector=select.select([sys.stdin],[],[])# 循环等待输入whileTrue:# 等待输入ready_to_read,_,_=selector.select()# 如果有数据可读ifready_to_read:# 读取输入command=raw_input().lower()# 处理输入ifcommand=="commands":print'"look around"'print'"explore"'print...
如果對else如何檢查break可以參考《精通Python》這本書,或是查看〈Python for 迴圈(loop)的基本認識與7種操作〉這篇文章的「使用else陳述句檢查break是否被呼叫」段落。 使用continue跳過這次,並繼續下一個迴圈 在英文世界裡,continue 代表繼續的意思;Python 世界中,continue是停止執行接下來的的程式碼,返回到迴圈的...
Python While 循环语句 Python 编程中 while 语句用于循环执行程序,即在某条件下,循环执行某段程序,以处理需要重复处理的相同任务。其基本形式为: while判断条件(condition):执行语句(statements)…… 执行语句可以是单个语句或语句块。判断条件可以是任何表达式,任何非零、或非空(null)的值均为true。
Example: while loop with if-else and break statement x = 1; s = 0 while (x < 10): s = s + x x = x + 1 if (x == 5): break else : print('The sum of first 9 integers : ',s) print('The sum of ',x,' numbers is :',s) ...
The while Loop With thewhileloop we can execute a set of statements as long as a condition is true. ExampleGet your own Python Server Print i as long as i is less than 6: i =1 whilei <6: print(i) i +=1 Try it Yourself »...
Python Syntax whileTrue:ifcondition_1:break...ifcondition_2:break...ifcondition_n:break This syntax works well when you have multiple reasons to end the loop. It’s often cleaner to break out from several different locations rather than try to specify all the termination conditions in the lo...
Python comes with two inbuilt keywords to interrupt loop iteration,breakandcontinue. Break Keyword In While loop The break keyword immediately terminates the while loop. Let's add a break statement to our existing code, x =1while(x<=3):print(x) x = x +1ifx ==3:breakelse:print("x is...
The do...while loop is a variant of the while loop with one important difference: the body of do...while loop is executed once before the condition is checked. Its syntax is: do { // body of loop; } while (condition); Here, The body of the loop is executed at first. Then the...