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 LEFT()
 Extract a substring beginning with the first character in a string
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 Syntax

     LEFT(<cString>, <nCount>) --> cSubString

 Arguments

     <cString> is a character string from which to extract characters.
     The maximum size of <cString> is 65,535 (64K) bytes.

     <nCount> is the number of characters to extract.

 Returns

     LEFT() returns the leftmost <nCount> characters of <cString> as a
     character string.  If <nCount> is negative or zero, LEFT() returns a
     null string ("").  If <nCount> is larger than the length of the
     character string, LEFT() returns the entire string.

 Description

     LEFT() is a character function that returns a substring of a specified
     character string.  It is the same as SUBSTR(<cString>, 1, <nCount>).
     LEFT() is also like RIGHT() which returns a substring beginning with the
     last character in a string.

     LEFT(), RIGHT(), and SUBSTR() are often used with both the AT() and
     RAT() functions to locate the first and/or the last position of a
     substring before extracting it.

 Examples

     .  This example extracts the first three characters from the left
        of the target string:

        ? LEFT("ABCDEF", 3)                 // Result: ABC

     .  This example extracts a substring from the beginning of a
        string up to the first occurrence of a comma:

        LOCAL cName := "James, William"
        ? LEFT(cName, AT(",", cName) - 1)   // Result: James

 Files:  Library is CLIPPER.LIB.