Constant R←{X}(A⍨)Y

A, X and Y are arrays. The Constant operator returns array A.

Examples

      'mu'⍨ 'any' ⎕NULL   ⍝ Always returns its operand
mu
      1E100 ('mu'⍨) 1j1
mu
      ¯1⍨¨ ⍳2 3
¯1 ¯1 ¯1
¯1 ¯1 ¯1