l=['你',' 好',' 帅']
n=0
while n<=2:
s=l[n]
n=n+1
print(s)
if n==3:
q=['你',' 是',' 帅哥']
n=n-1
s=q[n]
if n==-1:
break
俩while循环只写一个break肯定死循环，后面再加一个break或者让n大于3就跳出循环了
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nb
l=['你',' 好',' 帅']
n=0
while n<=2:
s=l[n]
n=n+1
print(s)
if n==3:
q=['你',' 是',' 帅哥']
n=n-1
while n<=2:
s=q[n]
n=n-1
print(s)
if n==-1:
n=0
break