for i in L: print ("Hello, %s!" %i)
n=0 while n<len(L): print('Hello, %s!' %L[n]) n=n+1
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兔皮虎桦桦
用for循环实习
for i in L: print ("Hello, %s!" %i)
用while循环实现：
n=0 while n<len(L): print('Hello, %s!' %L[n]) n=n+1