Python练习（一）

count = 0
while count<10:
    count += 1
    if count==7:
        continue
    print(count)

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

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

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

count = 1
sum = 0
while count <= 99:
    sum = count + sum
    count += 1
print(sum)

count = 0
username = "Andraw_Wu"
password = "123"
while count <= 2:
    _username = input("输入用户名")
    _password = input("输入密码")
    if username == _username and password == _password:
        print("登陆成功")
        break
    else:
        print(‘登录失败‘)
    count += 1
else:
    print("登录次数过多，只可登录三次")