elt [Accessor]

elt sequence index => object

(setf ( elt sequence index) new-object)

Arguments and Values::

sequence---a proper sequence.

index---a valid sequence index for sequence.

object---an object.

new-object---an object.

Description::

Accesses the element of sequence specified by index.

Examples::

 (setq str (copy-seq "0123456789")) =>  "0123456789"
 (elt str 6) =>  #\6
 (setf (elt str 0) #\#) =>  #\#
 str =>  "#123456789"

Exceptional Situations::

Should be prepared to signal an error of type type-error if sequence is not a proper sequence. Should signal an error of type type-error if index is not a valid sequence index for sequence.

See Also::

section aref [Accessor] , section nth [Accessor] ,

section Compiler Terminology

Notes::

aref may be used to access vector elements that are beyond the vector's fill pointer.

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