Returns the length of a character string, ignoring any trailing blanks. This is identical to the standard LEN_TRIM intrinsic, and is only included for backwards compatibility.

GNU extension

Elemental function

RESULT = LNBLNK(STRING)

The return value is of INTEGER(kind=4) type.

INDEX — Position of a substring within a string, LEN_TRIM — Length of a character entity without trailing blank characters