# 1、使用while循环输入 1 2 3 4 5 6     8 9 10

count = 1

while count<11 :     #使用while语句循环输入123...10

    if count == 7:   # 使用if语句中的pass,将7跳过不输入

        pass

    else:

        print(count)

    count +=1

print('-------end-------')

##################

# 2、求1-100的所有数的和

temp = 1

sum = 0

while temp <101:

    sum = sum+temp

    temp +=1

print(sum)

print('-------end-------')

#################

# 3、输出 1-100 内的所有奇数

count = 1

while count<101:

    n = count %2

    if n==0:

        pass

    else:

        print(count)

    count +=1

print('-------end-------')

# 4、输出 1-100 内的所有偶数

count = 1

while count < 101:

    n = count%2

    if n==0:

        print(count)

    else:

        pass

    count += 1

print('-------end-------')

################

# 5、求1-2+3-4+5 ... 99的所有数的和

count = 1

sum1 = 0

sum2 = 0

sum = 0

while count <100:

    if count %2:

        sum1=sum1+count

    else:

        sum2 = sum2 +count

    sum = sum1 - sum2

    count += 1

print (sum)

print('-------end-------')

m =1

s=0

while m<100:

    j = m%2

    if j==0:

        s = s -m

    else:

        s = s +m

    m = m +1

print(s)

print('-------end-------')

#6.用户登陆（三次机会重试）

count = 0

while count<3:

    user_id = input('请输入用户名：')

    password = input("请输入密码：")

    if user_id =='mada' and password == '':

        print('登录成功')

        break

    else :

        print('用户名或密码错误，请重新输入')

    count +=1