python基础练习题

n=1
while n<11:
                if n==7:
                                pass
                else:
                                print(n)
                n=n+1
print(‘---end---‘)

n=1
sum=0
while n<101:
                sum=sum+n
                n=n+1
print(sum)

n=1
while n<101:
                if n%2==1:
                                print(n)
                else:
                                pass
                n=n+1
print(‘---end---‘)

n=1
while n<101:
                if n%2==1:
                                pass
                else:
                                print(n)
                n=n+1
print(‘---end---‘)

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

count=0
while count<3:
                user=input(‘>>>‘)
                pwd=input(‘>>>‘)
                if user==‘alex‘and pwd==‘123‘:
                                print("欢迎登陆！")
                                break
                else:
                                print("用户名或密码错误")
                count=count+1