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: num2str_comp.m
    path of file: ./repos/MATL/compatibility
    
    the code of the file until where you have to start completion: function y = num2str(varargin)
% Avoids '-0' in result by the simple procedure of adding 0 to the input

    
function y = num2str(varargin)
% Avoids '-0' in result by the simple procedure of adding 0 to the input
% if it's numeric. ('-0' arises in Octave because of "negative 0". It turns
% out that adding "(positive) 0" to "negative 0" gives "(positive) 0".
if isnumeric(varargin{1})
    varargin{1} = varargin{1} + 0;
end