Y must be a numeric array.  R is numeric.  R is the reciprocal of Y; that is 1÷Y.  If ⎕DIV=0, ÷0 results in a DOMAIN ERROR.  If ⎕DIV=1, ÷0 returns 0.

⎕DIV is an implicit argument of Reciprocal.

Examples

      ÷4 2 5
0.25 0.5 0.2
 
      ÷0j1 0j¯1 2j2 4j4
0J¯1 0J1 0.25J¯0.25 0.125J¯0.125
 
      ⎕DIV←1 
      ÷0 0.5
0 2