The ArrayDims(A) function returns a sequence of integer ranges representing the bounds of each dimension of Array A.

This function is equivalent to op(2, A).

The ArrayNumDims(A) function returns the number of dimensions of Array A.

This function is equivalent to nops([ArrayDims(A)]).

These functions cannot be used on Matrices or Vectors.

$A≔\mathrm{Array}\left(\left[\left[1\,2\,3\right]\,\left[4\,5\,6\right]\right]\right)$

$A≔\left[\begin{array}{ccc}1& 2& 3\\ 4& 5& 6\end{array}\right]$

$\mathrm{ArrayDims}\left(A\right)$

$1..2,1..3$

$\mathrm{upperbound}\left(A\right)$

$2,3$

$\mathrm{ArrayNumDims}\left(A\right)$

$2$