L=['Bart','Lisa','Adam'] for x in L: print('Hello,%s!'%(x))
L=['Bart','Lisa','Adam'] a=0 while a<len(L): print('Hello,%s!'%L[a]) a+=1
死循环： n=1 while n>0: n+=1 print(n)
input()
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___波子
L=['Bart','Lisa','Adam'] for x in L: print('Hello,%s!'%(x))
for in 法
L=['Bart','Lisa','Adam'] a=0 while a<len(L): print('Hello,%s!'%L[a]) a+=1
while 法