インテル® Fortran コンパイラー 14.0 ユーザー・リファレンス・ガイド
Inquiry Intrinsic Function (Generic): Returns the base of the model representing numbers of the same type and kind as the argument.
The result is a scalar of type default integer. For an integer argument, the result has the value r (as defined in Model for Integer Data). For a real argument, the result has the value b (as defined in Model for Real Data).