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ANSI Common Lisp  17 Sequences 17.3 Dictionary of Sequences
- Syntax:
-
length
sequence
 n
- Arguments and Values:
-
sequence - a proper sequence.
n - a non-negative integer.
- Description:
-
Returns the number of elements in sequence.
If sequence is a vector with a fill pointer,
the active length as specified by the fill pointer is returned.
- Examples:
-
(length "abc") 3
(setq str (make-array '(3) :element-type 'character
:initial-contents "abc"
:fill-pointer t)) "abc"
(length str) 3
(setf (fill-pointer str) 2) 2
(length str) 2
- Exceptional Situations:
-
Should be prepared to signal an error of type type-error if sequence is not a proper sequence.
- See Also:
-
list-length,
sequence
- Allegro CL Implementation Details:
-
None.
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