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傳回數值的正平方根。

語法

SQRT(number)

Number     是您所要平方根的數字。

註解

如果 number 是負數,SQRT 函數會傳回錯誤值 #NUM!。

範例

公式

說明 (結果)

=SQRT(16)

16 的平方根 (4)

=SQRT(-16)

16 的平方根。因為該數為負數,所以傳回錯誤 (#NUM!)

=SQRT(ABS(-16))

該數絕對值的平方根 (4)

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