while循环语句练习题

Posted 2020-11-26 brucekim

#使用while循环输入1 2 3 4 5 6 8 9 10
"""
n = 1
while n < 11:
    if n == 7:
        pass
    else:
        print(n)
    n = n + 1
print ("-----end-----")
"""

#输出1-100的所有奇数

"""
n = 1 
while n < 101:
    temp = n % 2
    if temp == 0:
        pass
    else:
        print(n)
    n = n + 1

"""

#输出1-100的所有偶数

‘‘‘
n = 1
while n < 101:
    temp = n % 2
    if temp != 0:
        pass
    else:
        print(n)
    n = n +1
    
‘‘‘

#求1-100的和

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

‘‘‘
#求1-2+3-4+5-6...99所有数的和

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

 

#用户登录三次机会
count = 0
while count < 3:
    user = input("请输入用户名：")
    pwd = input(“请输入密码：”)
    if user == ‘kim‘ and pwd == ‘123‘
        print(‘欢迎登录‘)
        break
    else:
        print(‘用户名或密码错误，请重试‘)
    count = count + 1