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参照するセルの値、数式、または内容が空白かどうかを調べます。
ISBLANK( cellreference )
ISBLANK( value )
ISBLANK( expression )
セル参照、数値、テキスト、または数式を指定します。
この関数は、セル内のデータ、直接指定したテキストや数値、または関数や数式の結果をテストするために使用します。
この関数は、引数が空白セルを参照する場合、または参照先のデータがない場合はTRUEを返します。
注意: GC.Spreadの関数実装は、一般に、他の主要なスプレッドシート製品と同様に動作するように設計されています。しかし、これらのすべての他社製品で、空白文字列 "" を空白セルとして扱うかどうかが統一されているわけではありません。 GC.Spreadでは、COUNTBLANKおよびCOUNTBLANKおよびISBLANK関数の両方で一貫して、空白文字列 "" を空白セルとはみなさずに処理しています。
任意の型のデータを受け取り、 ブール値(TRUEまたはFALSE)を返します。
ISBLANK(B1)
ISBLANK(A4)
ISBLANK(A4-52)
ISBLANK(4) 結果: FALSE