この関数は Google スプレッドシートでも Excel と同じように機能します。構文も引数も同じです。
ISERR(value)The ISERR function returns TRUE if the provided value is an error such as #VALUE!, #REF!, #DIV/0!, #NUM!, #NAME?, or #NULL!. Unlike the ISERROR function, ISERR specifically excludes the #N/A error from its TRUE result.
=ISERR(1/0)結果: TRUE
Returns TRUE because 1/0 results in the #DIV/0! error.
=ISERR(NA())結果: FALSE
Returns FALSE because ISERR ignores the #N/A error.
ISERR returns FALSE for #N/A errors, while ISERROR returns TRUE for all error types including #N/A.