#1.while使用while循环输入1 2 3 4 5 6 8 9 10
'''count = 0
while count<10:
count += 1
if count == 7:
continue
else:
print(count)'''
#2.while求1-100的和
'''count=1
sum=0
while count<101:
sum+=count
count+=1
print(sum)'''
#3.输出1-100内所有的奇数
#方法一:
'''count=1
while count<101:
print(count)
count+=2'''
#方法二:
'''count=1
while count<101:
if count%2 == 1:
print(count)
count+=1'''
#4.输出1-100内所有偶数与上面方法相同
#5.求1-2+3-4+5...99的所有数的和
'''count=1
sum=0
while count<100:
if count%2==1:
sum+=count
else:
sum-=count
count+=1
print(sum)'''
#6.用户登陆(三次机会重试)
'''i=0
while i<3:
username=input("请输入账号:")
password=input("请输入密码:")
if username=='orange' and password=='123':
print('登陆成功')
break
else:
if i != 2:
print('登陆失败还有'+str(2-i)+'次机会')
else:
print('登陆失败')
i+=1'''
