Y may be any numeric array. R is numeric composed of the absolute (unsigned) values of Y.

Note that the magnitude of a complex number (a+ib) is defined to be (a2+b2)0.5.

Examples

      |2 ¯3.4 0 ¯2.7
2 3.4 0 2.7
 
      |3j4
5

⎕IO is an implicit argument of magnitude.