4. 其他流程控制工具 — Python 3.10.2 文档
4.4 循环中的break、continue else
for n in range(2,10):
for x in range(2,n):
if n % x == 0 :
print(n,'equals',x,'*',n//x)
break
else:
#loop fell through without finding a factor
print(n,'is a prime number')
