python基础（二）

count = 1
while count <= 10:
    print(count)
    # count = count + 1
    count += 1

count = 1
while count <= 10:
    if count == 7:
        print(‘ ‘)
    else:
        print(count)
    count += 1

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

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

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

count = 1
while count < 99:
    count += 2
    print(count)

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

count = 0
while count < 3:
    name = input("请输入用户名")
    password = input("请输入密码")
    if name == ‘mahelin‘ and password == ‘250238linlin‘:
        print("登录成功")
    elif count == 2:
        print("登录失败")
    else:
        print("登录失败请重试")
    count += 1