#条件
if condition:
statement1
elif condition:
statement2
else:
statement3
#循环
while condition:
statement1
else:
statement2 #不满足while条件时走else
#循环
for i in range(0,5):
if i>3:
continue#不走print直接到下一下循环
if i>2:
break#跳出循环,走else
print(i)
else:##非break出循环,不走else。只有break出循环,走else
print("走else。")
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