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(elisp)Vector Type

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Vector Type
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   A "vector" is a one-dimensional array of elements of any type.  It
takes a constant amount of time to access any element of a vector.  (In
a list, the access time of an element is proportional to the distance of
the element from the beginning of the list.)

   The printed representation of a vector consists of a left square
bracket, the elements, and a right square bracket.  This is also the
read syntax.  Like numbers and strings, vectors are considered constants
for evaluation.

     [1 "two" (three)]      ; A vector of three elements.
          => [1 "two" (three)]

   Note: Vectors, for functions that work with vectors.