分数代码

score = int(input("输入分数:"))

if score > 100:
    print("最高分才100...")
elif score >= 90:
    print("A")
elif score >= 60:
    print("C")
elif score >= 80:
    print("B")
elif score >= 40:
    print("D")
else:
    print("太笨了...E")

比较分数

name = input('请输入名字：')
age = input('请输入年龄：')

if name == '小二':
    if age == '18':
        print(666)
    else:
        print(333)
else:
    print('错了....')

if条件判断

print('111')
while True:
    print('我们不一样')
    print('在人间')
    print('痒')
print('222')

while 从一加到一百

count = 1
flag = True
#标志位
while flag:
    print(count)
    count = count + 1
    if count > 100 :
        flag = False


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


count = 1
sum = 0

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

print('11')
while True:
    print('222')
    print(333)
    break
    print(444)
print('abc')

count = 1
while True:
    print(count)
    count = count + 1
    if count > 100:break




print(111)
count = 1
while count < 20 :
    print(count)
    continue
    count = count + 1

i = 0
while i < 3 :
        username = input('输入用户名: ')
        password = int(input('输入密码'))
        if username == 'kkk' and password == 123:
                print ('登录成功')
        else:
                print ('登录失败重新登录')
        i += 1

三次登录帐号密码

count = 0
while count <= 100 : 
    count += 1
    if count > 5 and count < 95: 
        continue 
    print("loop ", count)

print("-----out of while loop ------")