You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sw_smow.m
    path of file: ./repos/CDT/cdt/private
    
    the code of the file until where you have to start completion: 
function dens = sw_smow(T)

% SW_SMOW    Denisty of standard mean ocean water (pure water)
%=========================================================================
    
function dens = sw_smow(T)

% SW_SMOW    Denisty of standard mean ocean water (pure water)
%=========================================================================
% SW_SMOW  $Id: sw_smow.m,v 1.1 2003/12/12 04:23:22 pen078 Exp $
%          Copyright (C) CSIRO, Phil Morgan 1992.
%
% USAGE:  dens = sw_smow(T)
%
% DESCRIPTION:
%    Denisty of Standard Mean Ocean Water (Pure Water) using EOS 1980.
%
% INPUT:
%   T = temperature [degree C (ITS-90)]
%
% OUTPUT:
%   dens = density  [kg/m^3]
%
% AUTHOR:  Phil Morgan 92-11-05, Lindsay Pend