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LENGTH Function. Returns the length of a non-blank character string, excluding trailing blanks, and returns 1 for a blank character string. The LENGTH function returns a length in bytes, while the KLENGTH function returns a length in a character based unit. Syntax.
The length of a string can also be stored explicitly, for example by prefixing the string with the length as a byte value; a convention used in many Pascal dialects, as a consequence, some people call such a string a Pascal string or P-string. Storing the string length as byte limits the maximum string length to 255.