# 空白のセルの処理

Case

Formula

A1: 1
B1: <Empty>

C1: =B1

Displays 0

=B1=0

TRUE

=B1=""

TRUE

=C1=0

TRUE

=C1=""

TRUE (previously was FALSE)

=ISNUMBER(B1)

FALSE

=ISNUMBER(C1)

FALSE (previously was TRUE)

=ISNUMBER(VLOOKUP(1;A1:C1;2))

FALSE (B1)

=ISNUMBER(VLOOKUP(1;A1:C1;3))

FALSE (C1, previously was TRUE)

=ISTEXT(B1)

FALSE

=ISTEXT(C1)

TRUE

=ISTEXT(VLOOKUP(1;A1:C1;2))

FALSE (B1, previously was TRUE)

=ISTEXT(VLOOKUP(1;A1:C1;3))

FALSE (C1)

=ISBLANK(B1)

TRUE

=ISBLANK(C1)

TRUE

=ISBLANK(VLOOKUP(1;A1:C1;2))

TRUE (B1, previously was FALSE)

=ISBLANK(VLOOKUP(1;A1:C1;3))

FALSE (C1)

Microsoft Excel は動作が異なり、空白のセルまたは空白のセルの結果を含む数式セルへの参照の結果を常に数値として返します。たとえば、次のようになります。

Case

Formula

A1: <Empty>

B1: =A1

Displays 0, but is just a reference to an empty cell.

=ISNUMBER(A1)

FALSE

=ISTEXT(A1)

FALSE

=A1=0

TRUE

=A1=""

TRUE

=ISNUMBER(B1)

FALSE (Microsoft Excel: TRUE)

=ISTEXT(B1)

FALSE

=B1=0

TRUE

=B1=""

TRUE (Microsoft Excel: FALSE)

C1: =VLOOKUP(...) with empty cell result

displays empty (Microsoft Excel: displays 0)

=ISNUMBER(VLOOKUP(...))

FALSE

=ISTEXT(VLOOKUP(...))

FALSE

=ISNUMBER(C1)

FALSE (Microsoft Excel: TRUE)

=ISTEXT(C1)

FALSE

ご支援をお願いします！