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# DDB Function [VBA]

Returns the depreciation of an asset for a specified period using the arithmetic-declining method.

该功能或常量可通过以下语句启用：Option VBASupport 1，该语句需要放置在模块的每个可执行程序代码的前面。

## 语法：

    DDB(Cost As Double, Salvage As Double, Life as Double, Period as Double, [Factor as Variant])

## 返回值：

Double

## 参数：

Cost fixes the initial cost of an asset.

Salvage fixes the value of an asset at the end of its life.

Life is the number of periods (for example, years or months) defining how long the asset is to be used.

Period states the period for which the value is to be calculated.

Factor (optional) is the factor by which depreciation decreases. If a value is not entered, the default is factor 2.

Use this form of depreciation if you require a higher initial depreciation value as opposed to linear depreciation. The depreciation value gets less with each period and is usually used for assets whose value loss is higher shortly after purchase (for example, vehicles, computers). Please note that the book value will never reach zero under this calculation type.

## 错误代码：

5 无效的过程调用

## 示例：

    Sub ExampleDDB

     Dim ddb_yr1 As Double

     ddb_yr1 = DDB(75000,1,60,12,2)

     Print ddb_yr1 ' returns 1,721.81 currency units.

    End Sub

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