MATLAB: What is “l”

fftisarMATLAB

Hello everyone,
I recently bought a book on Inverse Synthtic Aperture Radars and it contains many MATLAB codes for verifying the results shown in the book. One such MATLAB function is as follows:
function [out]=shft(A,n)
%This function shifts (circularly) the vector A with
% an amount of n
 
% Inputs:
% A  : the vector to be shifted
% n  : shift amount
 
% Output:
% out  : shifted vector 
 
out = A(l-n+2:l);
out(n:l) = A(1:l-n+1);
However, there is no reference or assignment to "l". Further, the code which actually utilizes this function dosesn't assigns any value to "l" (So, "l" is missing from it as well).
This code was most probably written around 2011 or even earlier. Was "l" used for any particular notation at that time and now, that notation has been vanished with updates in MATLAB? I'll use the newer notations or update the code if necessary.
Kindly help me with this.

Best Answer

No, l did not have any special meaning.
Is it possible that this is a nested function? Was there an end statement after what you posted, and was it defined inside another function, like
function outer
    l = 7
    A = rand(1,25);
    n = 3;
    disp(shft(A,n))
    function out = shft(A,n)
        out = A(l-n+2:l);
    end
end
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