length
(length sequence)
Returns the number of elements in a sequence. It works on lists, strings, and rank-1 vectors; (length nil) is 0. A rank-2 array is not a sequence, so calling length on one signals an error.
(length sequence)
Returns the number of elements in a sequence. It works on lists, strings, and rank-1 vectors; (length nil) is 0. A rank-2 array is not a sequence, so calling length on one signals an error.