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決定數值的正負號。如果此數值是正數,會傳回 1,如果是 0 則傳回 0,如果數值是負數,則傳回 -1。

語法

SIGN(number)

Number     為任何實數。

範例

公式

說明 (結果)

=SIGN(10)

正數的代碼 (1)

=SIGN(4-4)

零的代碼 (0)

=SIGN(-0.00001)

負數的代碼 (-1)

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