× Sign of

One-argument form  See also two-argument form Multiply

Shows the sign of the number(s) in the right-hand argument. Each positive number is represented by a 1, each negative number by a ¯1 and each zero by a 0.

             ×33 98 0 ¯5
       1 1 0 ¯1
             ×(¯33.1 0 27) 55 (2 2⍴¯2+⍳4)
        ¯1 0 1  1    ¯1  0
                      1  1