python中的while语句

循环使用 else 语句

在 python 中，while … else 在循环条件为 false 时执行 else 语句块：

实例

#!/usr/bin/python

count = 0

whilecount <5:  

printcount," is less than 5"  

count =count +1

else:  

printcount," is not less than 5"

以上实例输出结果为：

0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 55 is not less than 5

numbers=[1,2,3,4,5]

even=[ ]

odd=[ ]

while len(numbers)>0:

        number=numbers.pop()

     if(number%2==0):

       even.append(number)

    else:

       odd.append(number)

猜大小的游戏

#!/usr/bin/python# -*- coding: UTF-8 -*-import randoms = int(random.uniform(1,10))#print(s)m = int(input('输入整数:'))while m != s:    if m > s:        print('大了')        m = int(input('输入整数:'))    if m < s:        print('小了')        m = int(input('输入整数:'))    if m == s:        print('OK')        break;

猜拳小游戏

#!/usr/bin/python# -*- coding: UTF-8 -*-import randomwhile 1:    s = int(random.randint(1, 3))    if s == 1:        ind = "石头"    elif s == 2:        ind = "剪子"    elif s == 3:        ind = "布"    m = raw_input('输入 石头、剪子、布,输入"end"结束游戏:')    blist = ['石头', "剪子", "布"]    if (m not in blist) and (m != 'end'):        print "输入错误，请重新输入！"    elif (m not in blist) and (m == 'end'):        print "\n游戏退出中..."        break    elif m == ind :        print "电脑出了： " + ind + "，平局！"    elif (m == '石头' and ind =='剪子') or (m == '剪子' and ind =='布') or (m == '布' and ind =='石头'):        print "电脑出了： " + ind +"，你赢了！"    elif (m == '石头' and ind =='布') or (m == '剪子' and ind =='石头') or (m == '布' and ind =='剪子'):        print "电脑出了： " + ind +"，你输了！"

测试结果：

输入 石头、剪子、布,输入"end"结束游戏:石头电脑出了： 石头，平局！输入 石头、剪子、布,输入"end"结束游戏:石头    电脑出了： 剪子，你赢了！输入 石头、剪子、布,输入"end"结束游戏:

摇筛子游戏

#!/usr/bin/env python3# -*- coding: utf-8 -*-import randomimport sysimport timeresult = []while True:    result.append(int(random.uniform(1,7)))    result.append(int(random.uniform(1,7)))    result.append(int(random.uniform(1,7)))    print result    count = 0    index = 2    pointStr = ""    while index >= 0:        currPoint = result[index]        count += currPoint        index -= 1        pointStr += " "        pointStr += str(currPoint)    if count <= 11:        sys.stdout.write(pointStr + " -> " + "小" + "\n")        time.sleep( 1 )   # 睡眠一秒    else:        sys.stdout.write(pointStr + " -> " + "大" + "\n")        time.sleep( 1 )   # 睡眠一秒    result = []

十进制转二进制

#!/usr/bin/python# -*- coding: UTF-8 -*-denum = input("输入十进制数:")print denum,"(10)",binnum = []# 二进制数while denum > 0:    binnum.append(str(denum % 2)) # 栈压入    denum //= 2print '= ',while len(binnum)>0:    import sys    sys.stdout.write(binnum.pop()) # 无空格输出print ' (2)'

while循环 - 九九乘法表

#!/usr/bin/python# -*- coding: UTF-8 -*-#九九乘法表i = 1while i :    j = 1    while j:        print j ,"*", i ," = " , i * j , '  ',        if i == j :            break        j += 1        if j >= 10:            break        print "\n"    i += 1    if i >= 10:        break

这是一些博客主提供的非常好的例子值得借鉴学习。