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索引 🔎︎

# Left 函数

返回指定字符串表达式中的前若干个字符。

### 语法:

    Left (string As String, length As Long) As String

### 返回值:

字符串

### 参数:

string: Any string expression that you want to return the leftmost characters from.

length: Numeric expression that specifies the number of characters that you want to return. If length = 0, a zero-length string is returned. The maximum allowed value is 2,147,483,648.

以下示例将一个日期从 YYYY.MM.DD 格式转换为 MM/DD/YYYY 格式。

### 错误代码:

5 无效的过程调用

### 示例:

    Sub ExampleUSDate
    Dim sInput As String
    Dim sUS_date As String
        sInput = InputBox("Please input a date in the international format 'YYYY-MM-DD'")
        sUS_date = Mid(sInput, 6, 2)
        sUS_date = sUS_date & "/"
        sUS_date = sUS_date & Right(sInput, 2)
        sUS_date = sUS_date & "/"
        sUS_date = sUS_date & Left(sInput, 4)
        MsgBox sUS_date
    End Sub

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String functions