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ISNUMBER

参照するセルの値、数式、または内容が、数値データかどうかを調べます。

書式

ISNUMBER( cellreference )

ISNUMBER( value )

ISNUMBER( expression )

引数

セル参照、数値、テキスト、または数式を指定します。

解説

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、引数が数値であるか、または数値を参照する場合はTRUEを返します。引数が数値以外の値であるか、または数値以外の値を参照する場合にはFALSEを返します。 引数値または参照先のセルにデータがない場合も、FALSEを返します。

この関数を使用すると、セル範囲の値の平均を出す場合など、算術演算の対象となるセルに数値データが入っているかどうかをあらかじめ調べることができます。

データ型

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。

サンプル

ISNUMBER(B3)

ISNUMBER(R1C2)

ISNUMBER(12) 結果: TRUE