python_练习

#输出1 2 3 4 5 6   8 9 10
'''
count = 0
while count < 10:
    count+=1
    if count == 7:
        print(' ')

    print(count)
#1-100的和
count = 1
sum = 0
while count <=100:
    sum = sum + count
    count += 1
print(sum)

#3、输出 1-100 内的所有奇数
count = 1
while count <101:
    if count % 2 == 1:
        print(count)
    count+=1

#5、求1-2+3-4+5 ... 99的所有数的和
count = 1
sum = 0
while count <101:
    if count % 2 == 1:
        sum=sum-count
    else:
        sum = sum - count
    count = count+1
print(sum)

#6、用户登陆（三次机会重试）
#input 心中有账号，密码 while

i = 0
while i < 3:
    username = input('请输入账号：')
    password = int(input('请输入密码：'))
    if username == '咸鱼哥' and password == 123:
        print('登录成功')
    else:
        print('登录失败请重新登录')
    i += 1

'''