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for文、for..in、for..of文はどれを使うの?

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配列(反復可能オブジェクト)のループ

for文、またはfor..of文を使います。
添字が必要な場合はfor文を使います。

オブジェクトのループ

Object.keys、Object.values、Object.entriesを使い、配列や反復可能オブジェクトに変換した後、for文、またはfor..of文を使います。
for...in文を使う場合は、列挙可能性に注意する必要があります。

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