Last Updated
：2025/12/03
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。
（ plural ）
Quizzes for review
(programming) A binary operator that returns its second argument, unless the first argument is null, in which case it returns null; used to simplify code that would otherwise need multiple explicit checks for nullity.
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safe navigation operator
When accessing nested properties, using the safe navigation operator prevents NullPointerExceptions by returning null if any intermediate reference is null.
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When accessing nested properties, using the safe navigation operator prevents NullPointerExceptions by returning null if any intermediate reference is null.
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