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傳回數字的階乘。某數的階乘等於 1*2*3*...* 數字。

語法

FACT(number)

Number     為您要階乘之非負數的數字。如果數字不是整數,則會取至整數位數。

範例

公式

說明 (結果)

=FACT(5)

5 的階乘,或 1*2*3*4*5 (120)

=FACT(1.9)

1.9 之整數的階乘 (1)

=FACT(0)

0 的階乘 (1)

=FACT(-1)

負數導致錯誤值 (#NUM!)

=FACT(1)

1 的階乘 (1)

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