numbers=[]whilei<num:print"At the top i is %d"%i numbers.append(i) i=i+stepprint"Numbers now:",numbersprint"At the bottom i is %d"%iprint"The numbers:"forninnumbers:printndeftest_fun2(num,step): numbers=[]foriinrange(0,num,step):print"At the top i is %d"%i numbers.append(i...
for x in range(2, -1, -1): print(x) Other Iterators 其他迭代器 例题: while和for...in实现循环 # use while to run loop guess_me = 7 number = 2 while True: if number < guess_me: print("too low") elif number == guess_me: print("found it!") break elif number > guess_me...
count +=1ifcount ==3:print('终止循环')breakelse:print("loop ", count)else:print("循环正常执行完了")print("---end---") 返回结果如下:---loop1loop2终止循环---end--- 不用非要从语义理解记忆,将while...else作为一组语句,正常语法执行完上面的while循环就执行下面的else语句,while循环被break...
With Python, you can use `while` loops to run the same task multiple times and `for` loops to loop once over list data. In this module, you'll learn about the two loop types and when to apply each.
while num < 10: num += 1 if num % 2 == 0: continue # 跳过偶数 print(num) 3. 循环中的else子句 for和while循环可以包含else块,当循环正常结束(未被break中断)时执行。 示例 python for i in range(5): print(i) else: print("Loop completed without break.") ...
A while loop is a programming concept that, when it's implemented, executes a piece of code over and over again while a given condition still holds true. The above definition also highlights the three components that you need to construct the while loop in Python: The while keyword; A cond...
For loop– For loops are used to sequentially iterate over a python sequence. When the sequence has been iterated completely, the for loop ends and thus executes the next piece of code. The While Loop In Python The while loop statement is used to repeat a block of code till a condition ...
“从零开始,一点一滴地分享所有我学到的Python知识。” 一、综述 在一般情况下,程序是按顺序依次执行的。但,循环(loop)语句允许我们多次执行一个语句或一组语句。 Python中的循环语句可分为以下几种:for循环,while循环和嵌套循环。其中,嵌套循环指,在一个循环里嵌套了另一个循环的循环体。
Python for循环可以遍历任何序列的项目,如一个列表或者一个字符串。 什么是Python中的for循环? Python中的for循环用于迭代序列(list,tuple,string)或其他可迭代对象。在序列上进行迭代称为遍历。 for循环的语法 for val in sequence: Body of for 在此,val是在每次迭代中获取序列内项目值的变量。 循环继续直到...
Python中的for语句,没你想的那么简单~ for语句实际上解决的是循环问题。在很多的高级语言中都有for循环(for loop)。for语句是编程语言中针对可迭代对象的语句,它的主要作用是允许代码被重复执行。看一段来自维基百科的介绍: Incomputer science, afor-loop(or simplyfor loop) is acontrol flowstatementfor specify...