.. efun:: int abs(int number)
  float abs(float number)

  Returns the absolute value of :arg:`number`.

  .. usage::

    ::

      abs(-18)    - returns 18
      abs(11)     - returns 11
      abs(-1.974) - returns 1.974

  :history 3.2.6 introduced:

  .. seealso:: :efun:`sin`, :efun:`asin`, :efun:`cos`, :efun:`acos`, :efun:`tan`, :efun:`atan`, :efun:`log`, :efun:`exp`, :efun:`sqrt`, :efun:`floor`, :efun:`ceil`, :efun:`pow`, :efun:`sgn`