python 习题

使用while循环输入123456 8910

count = 1 
while count <= 10: 
    print(count)
    if  count == 6:
        print(" ")
        count += 1
    count += 1

#求1-100所有数的和 　　

count = 0
sam = 0
while count < 100:
    count += 1
    sam += count
print(sam)

#求1-100内所有的奇数　　

count = 1
while count <= 100:
    if count % 2 == 1:
        print(count)
    count += 1

　

#求1-100内所有的偶数

count = 1
while count <= 100:
    if count % 2 == 0:
        print(count)
    count += 1

　　

#求1-2+3-4+5...99的所有数的和　

count = 1
sum = 0
while count <= 99:
    if count % 2 == 1:
        sum += count
    else:
        sum -= count
    count += 1
print(sum)

#用户登录（三次机会重试）

name = '小龟龟'
password = '123'
count = 1
while count <= 3:
    a = input('请输入姓名：')
    b = input('请输入密码：')
    if name == a and password == b:
         print('输入正确')
         break 
    elif count == 3:
        print('三次输入错误，退出。')
    else:
        print('输入错误，请重新输入！')
    count += 1