python 基础(练习题)

1.使用while 循环输入 1 2 3 4 5 6 7 8 9 10

num = 1
while num < 11:
    print(num)
    num += 1

2.求1-100的全部数的和num = 1sum = 0while num <101:    sum += num    num += 1print(sum)3.输出1-100内的全部奇数num = 1while num < 101:    temp = num % 2    if temp == 0:        print(num)    num += 1    4.输出1-100内的全部偶数sum = 1while sum < 100:    tang = sum % 2    if tang != 0:       print(sum)    sum += 1    5.模拟用户登陆，容许用户错三次（帐号为tang，密码123456）sum = 0while sum < 3:   user = input("请输入帐号：")   password = input("请输入密码：")   if user == "tang":      if password == "123456":         print("登陆成功")         break      else:         print("密码错误")   else:      print("没有此用户")   sum += 1