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STATIC FUNCTION Left ( String AS String [ , Length AS Integer ] ) AS StringReturns the Length first characters of an UTF-8 string.
If Length is not specified, the first character of the string is returned.
If Length is negative, all the string except the (- Length ) last characters is returned.
 | This function deals with UTF-8 strings, and so all positions and lengths are given in characters and not in bytes. |