continueLoop = 'Y' while continueLoop == 'Y': # Execute the loop body once # Prompt the user for confirmation continueLoop = input("Enter Y to continue and N to quit: ") 1. 2. 3. 4. 5. 6. 使用哨兵值控制循环 另一个常见的控制循环的技术是指派一个特殊的输入值,这个值被称作哨兵值...
需要使用此语句与loop...until 只需添加输入关键字的时候,希望在第一次迭代开始。 语法: loop...until loop with entry 的语法是: loop with entry do -- Statements to be executed. entry -- Initialisation statements. until expression 在执行表达式 expression 之前,它会执行初始化语句,那么它会作为一个正...
与其他语言不同,Python没有do-until或do-while结构(这将允许在测试条件之前执行一次代码)。然而,你可以结合while True和break关键字来达到同样的目的。 a = 10 while True: a = a-1 print(a) if a<7: break print('Done.') #输出: 9 8 7 6 Done. 循环和元素解析 例如,如果你希望循环遍历一个对称...
另外,在Python中没有do..while循环。 以下实例使用了 while 来计算 1 到 100 的总和: #!/usr/bin/env python3 n = 100 sum = 0 counter = 1 while counter <= n: sum = sum + counter counter += 1 print("Sum of 1 until %d: %d" % (n,sum)) 执行结果如下: Sum of 1 until 100: 50...
while True in Python creates an infinite loop that continues until a break statement or external interruption occurs. Python lacks a built-in do-while loop, but you can emulate it using a while True loop with a break statement for conditional termination.With...
Example: Python while Loop # Print numbers until the user enters 0 number = int(input('Enter a number: ')) # iterate until the user enters 0 while number != 0: print(f'You entered {number}.') number = int(input('Enter a number: ')) print('The end.') ...
The While statement is a type of loop statement. If the condition is met, the internal instruction is executed until the condition is not met. If the condition is not met, the internal instruction is not executed. Here is a piece of code to guess the number. To obtain random numbers, ...
loop.run_until_complete(example_coroutine()) 2.asyncio.gather的并发执行 asyncio.gather函数允许你并发执行多个协程,这样可以提高异步程序的效率。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 pythonCopy codeimport asyncioasyncdefcoroutine1():print("Coroutine 1 executing.")awaitasyncio.sleep(2)async...
continue:continue关键字用于在for循环(或while循环)中结束当前迭代,并继续进行下一个迭代。 break:break关键字用于中断for循环或while循环。 #continue、break(循环控制)foriinrange(10):ifi ==5:continueprint(i, end="|") print()foriinrange(10):ifi ==5:breakprint(i, end="|") ...
The infinite loop remains looped until the loop conditions are not met, and there is no need to determine the number of cycles in advance.其中条件与计语句中的判断条件一样，结果为 True 和 False。while 语义很简单，当条件判断为 True 时，循环体重复执行语句块中语句；当条件为 False 时，循环终止...