Last Updated：2025/12/03
Sentence
入れ子になったプロパティにアクセスする際、ヌル伝播演算子を使うと、中間の参照がヌルであればヌルを返してヌル参照エラーを防げます。
Quizzes for review
When accessing nested properties, using the safe navigation operator prevents NullPointerExceptions by returning null if any intermediate reference is null.
See correct answer
When accessing nested properties, using the safe navigation operator prevents NullPointerExceptions by returning null if any intermediate reference is null.
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Related words
safe navigation operator
Noun
Japanese Meaning
プログラミングにおいて、第一引数がnullの場合はnullを返し、そうでない場合は第二引数を返す二項演算子。明示的なnullチェックを省略してコードを簡略化するために使用され、「Null条件演算子」または「安全なナビゲーション演算子」とも呼ばれる。
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