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: insertion_sort.m
    path of file: ./repos/MATLAB-Octave/algorithms/sorting
    
    the code of the file until where you have to start completion: %A MATLAB/Octave implementation of the insertion sort algorithm.
%The basic premise is that the program checks whether two neighbouring elements
%in an array are in order and sorts them. It does length(array) number of
% passes. For further details and p
    
function differs slightly from the pseudocode because of
%how MATLAB/Octave arrays start at index 1.
%Note: this function is for educational purposes only.
%You will want to use the built-in sort function for actual coding,
%as it is much more efficent.
function y = insertion_sort(array)
  i = 1;
  %Assigning the length to a variable should make the program slightly faster.
  len = length(array);
  while i < len + 1
    j = i;
    while j > 1 && array(j - 1) > array(j)
      %Swapping array(j - 1) and array(j)
      temp = array(j - 1);
      array(j - 1) = array(j);
      array(j) = temp;
      j = j - 1;
    end