Handling of Empty Cells

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# Tratamento das celas baleiras

In older versions of the software, empty cells were forced to numeric 0 in some contexts and to empty string in others, except in direct comparison where =A1=0 and =A1="" both resulted in TRUE if A1 was empty. Emptiness now is inherited until used, so both =VLOOKUP(...)=0 and =VLOOKUP(...)="" give TRUE if the lookup resulted in an empty cell being returned.

A simple reference to an empty cell is still displayed as numeric 0 but is not necessarily of type numeric anymore, so also comparisons with the referencing cell work as expected.

Nos exemplos seguintes, A1 contén un número, B1 está baleira e C1 contén a referencia a B1:

A1: 1 B1: <Baleira> C1: =B1 (mostra 0)

=B1=0 => VERDADEIRO

=B1="" => VERDADEIRO

=C1=0 => VERDADEIRO

=C1="" => VERDADEIRO (anteriormente era FALSO)

=É.NÚM(B1) => FALSO

=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) => FALSE

=ISTEXT(VLOOKUP(1;A1:C1;2)) => FALSE (B1, previously was TRUE)

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

=ISBLANK(B1) => TRUE

=ISBLANK(C1) => FALSE

=ISBLANK(VLOOKUP(1;A1:C1;2)) => TRUE (B1, previously was FALSE)

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

Note that Microsoft Excel behaves different and always returns a number as the result of a reference to an empty cell or a formula cell with the result of an empty cell. For example:

A1: <Empty>

B1: =A1 => mostra 0, mais é só unha referencia a unha cela baleira

=É.NÚM(B1) => FALSO

=ÉTEXTO(A1) => FALSO

=B1=0 => VERDADEIRO

=B1="" => VERDADEIRO

=ÉNUMERO(B1) => FALSO (Microsoft Excel: VERDADEIRO)

=ÉTEXTO(B1) => FALSO

=B1=0 => VERDADEIRO

=B1="" => VERDADEIRO (Microsoft Excel: FALSO)

C1: =PROCV(…) con resultado de cela baleira => mostra baleira (Microsoft Excel: mostra 0)

=ÉNUMERO(PROCV(...)) => FALSO

=ÉTEXTO(PROCV(...)) => FALSO

=ÉNUMERO(C1) => FALSO (Microsoft Excel: VERDADEIRO)

=ÉTEXTO(C1) => FALSO