Differnce between STRLEN and NUMOFCHAR

Hello All,
Can anybody tell the difference between STRLEN and NUMOFCHAR.
Which is better to use and why to use the better one.
Can anybody explain me in detail. I will reward you with points.
Thanks,
Karan

hi,
STRLEN:
Returns the length of a character-type field in characters. With c-fields, as opposed to fields with type STRING, only the actual length used is relevant because blanks at the end are not counted.
NUMOFCHAR.
Returns the number of characters of a character-type field. In Unicode systems and non-Unicode systems with single-byte codepages, this function behaves like STRLEN. In non-Unicode systems with double-byte codepages, characters that take up more than one byte are counted with length 1, while STRLEN returns length 2.
just refer ABAPDOCU for more information.
reward if useful,
regards,
bharathi.

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