forループを使ってリストのstringを大文字にする際に、新たなリストは必要ですか？ for **** l=["Mon","tue","Wed","sat"] b=[] for a in l: a=a.upper() b.append(a) print(b) **** 'MON', 'TUE', 'WED', 'SAT' list bprint(l) stringa **** l=["Mon","tue","Wed","sat"] for a in l: a=a.upper() print(l) **** 'Mon', 'tue', 'Wed', 'sat'

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`a=a.upper()``a``l``a.upper()``l``a``l``l`

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`l`


for i in range(len(l)):
l[i] = l[i].upper()


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l=["Mon","tue","Wed","sat"]

for i in range(len(l)):
l[i] = l[i].upper()

print(l)


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['MON', 'TUE', 'WED', 'SAT']