11/09 2019

Simbolo diverso in Excel e altri simboli matematici

Esistono alcune funzioni di Microsoft Excel,  come ad esempio le funzioni logiche SE e PIÙ.SE, che rendono possibile “disegnare” percorsi o azioni differenti a seconda che il risultato di un test dia esito positivo o negativo.

In altre parole, con queste funzioni è possibile ordinare ad Excel di eseguire un certo calcolo a condizione che si verifichino determinate circostanze.

In questi casi, uno degli argomenti principali della funzione è il test che consiste in un’equazione o disequazione tra una cella e un valore:

ad esempio, A1 = “Mario” oppure A1 > 5.




Simboli matematici in Excel

Per utilizzare correttamente queste funzioni e per far si che il test sia esatto e che, di conseguenza, Excel calcoli in modo giusto il risultato, è importante conoscere bene tutti i simboli matematici che possono essere utilizzati in Excel.

Per questo motivo, di seguito trovate un comodissimo elenco di tutti gli operatori matematici che potete utilizzare:

  • Operatore    >      Significato: maggiore di – es. A1>5: il contenuto della cella A1 è maggiore di 5
  • Operatore    <      Significato: minore di – es. A1<5: il contenuto della cella A1 è minore di 5
  • Operatore    >=   Significato: maggiore o uguale a – es. A1>=5: il contenuto della cella A1 è maggiore o uguale a 5
  • Operatore    <=   Significato: minore o uguale a –  es. A1<=5: il contenuto della cella A1 è minore o uguale a 5
  • Operatore    =     Significato: uguale a – es. A1=5: il contenuto della cella A1 è uguale a 5
  • Operatore   <>    Significato: diverso da – es. A1<>5: il contenuto della cella A1 è diverso da 5




Simbolo diverso vs simbolo uguale: quando un dettaglio fa la differenza

 

Quando si usano questi operatori matematici all’interno delle funzioni è bene prestare molta attenzione perché, per ottenere un risultato esatto, dobbiamo essere certi di utilizzare il simbolo giusto, e di fare quindi ad Excel la giusta richiesta.

Infatti, per Excel non è la stessa cosa scrivere A1=A2 (simbolo uguale) oppure A1<>A2 (simbolo diverso), anzi, in questo caso, una espressione è esattamente l’opposto dell’altra, come nel caso A1<A2 o A1>A2.

 

Ad esempio, se la cella A1 contiene un numero e io voglio sapere se il valore contenuto nella cella A2 è maggiore, minore, uguale o diverso da quello della cella 1, devo fare attenzione a come scrivo la formula.

Infatti, se il valore di A1 è 5 e il valore di A2 è 7 se:

  • chiedo ad Excel =SE(A1>A2;”Vero”;”Falso”) otterrò FALSO, perché 5 NON È MAGGIORE di 7;
  • chiedo ad Excel =SE(A1<A2;”Vero”;”Falso”) otterrò VERO, perché 5 È MINORE di 7;
  • chiedo ad Excel =SE(A1=A2;”Vero”;”Falso”) otterrò FALSO, perché 5 NON È UGUALE da 7;
  • chiedo ad Excel =SE(A1<>A2;”Vero”;”Falso”) otterrò VERO, perché 5 È DIVERSO da 7.

*Nota: la sintassi della formula Se è la seguente: =se(test; azione se_vero; azione se_falso). In questi esempi, abbiamo deciso che se il test dava esito vero Excel doveva restituirmi il valore “Vero”, mentre se l’esito del test era falso doveva restituirmi il valore “Falso”.




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