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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.
Note that the use of the length() or size() function is important here because C++ strings are not guaranteed to be null-terminated (by a '\0'). (In fact, you should be able to store bytes with a value of 0 inside of a C++ string with no adverse effects.o take the length of a string, you can use either the length or size function, which are members of the string class, and which return the number of characters in a string: