17 排在第几个
挨个挪
砍一半
在 [13, 15, 17, 23, 24] 里从头找 17。运行下面这段程序:
def lfind(a, target):
for i in range(len(a)):
if a[i] == target:
return i
return -1
print(lfind([13, 15, 17, 23, 24], 17))
挨个挪
砍一半
在 [13, 15, 17, 23, 24] 里从头找 17。运行下面这段程序:
def lfind(a, target):
for i in range(len(a)):
if a[i] == target:
return i
return -1
print(lfind([13, 15, 17, 23, 24], 17))
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