A vector is a fixed-size sequence of Lisp objects, each element may be accessed in constant time—unlike lists where the time taken to access an element is proportional to the position of the element.
The read syntax of a vector is an opening square bracket, followed by zero or more space-separated objects, followed by a closing square bracket. For example,
[zero one two three]
In general it is best to use vectors when the number of elements to be stored is known and lists when the sequence may grow or shrink.
This function returns true if its argument, object, is a vector.
This function creates a new vector containing the arguments given to the function.
(vector 1 2 3) ⇒ [1 2 3] (vector) ⇒ 
Returns a new vector, size elements big. If initial-value is
defined each element of the new vector is set to initial-value, otherwise
they are all
(make-vector 4) ⇒ [() () () ()] (make-vector 2 t) ⇒ [t t]