Result = Left$ ( Arg AS String [ , Length AS Integer ] ) AS String
Result = Left ( Arg AS String [ , Length AS Integer ] ) AS String

返回Arg字符串从左侧第一个字符开始的Length长度的子串。

如果没有指定Length，返回字符串从左侧开始的第一个字符。

如果Length为负数，返回从左侧开始到距右侧(- Length )位置的字符串。

Example