Shape

The shape of an array is a vector of lengths of the dimensions of the array. The shape function  returns the shape of its right argument array. (⍬≡⍴)¨1 'A'                ⍝ The shape of a scalar is the empty numeric vector ⍬ 1 1     ⍴'ABCDE'                    ⍝ The shape of a vector is a length-1 vector 5     ⍴'ABC'∘.,1 2 3 4            ⍝ The shape of the matrix result of an outer product 3 4     ⍴'ABC'∘.,1 2 3 4∘.×0J1 1J2  ⍝ Two consecutive outer products result in a cuboid 3 4 2