| Absolute value

One-argument form  See also two-argument form Residue

Makes any negative numbers in the right-hand argument positive.

             | 2 ¯4 ¯7.8 3
       2 4 7.8 3
             |(¯0.1 ¯10.1 11.3 25) (2 2½¯10 3 ¯45 2.1)
        0.1 10.1 11.3 25  10 3
                          45 2.1