How do I make numbers shift using a while loop while keeping the last itteration?

I've made a separate function filed to call out the shift loop

function MyShiftLeft = MyShiftLeft(x)
y=[8 4 -2 5 4 0 -1]
temp=y(1); % save first value
% shift values left
for i=1:length(y)-1
    y(i) = y(i+1);
end
% set last value to first
    y(end)=temp;

y 

And This is my regular code that calls the function

x = input('Number of shifts to the left: ');
while x>0
    MyShiftLeft
    x = x-1;
end

When I run it, instead of shifting the numbers however many times, it just duplicates the ouput

y =

     8     4    -2     5     4     0    -1


y =

     4    -2     5     4     0    -1     8
     
     
y =

     8     4    -2     5     4     0    -1


y =

     4    -2     5     4     0    -1     8

Answer 1

[Chunru]

%x = input('Number of shifts to the left: ');
x = 3;
y=[8 4 -2 5 4 0 -1];

while x>0
    y = MyShiftLeft(y)
    x = x-1;
end

y = 1×7

4 -2 5 4 0 -1 8

y = 1×7

-2 5 4 0 -1 8 4

y = 1×7

5 4 0 -1 8 4 -2

function y = MyShiftLeft(y)
temp=y(1); % save first value
% shift values left
for i=1:length(y)-1
    y(i) = y(i+1);
end
% set last value to first
y(end)=temp;
end

Answer 2

[KSSV]

A = 1:5 ;  % example array 
for n = 1:5   % loop for shifting  
    B = circshift(A,n) ;  % for comapring the answer use inbuilt function 
    % Code for shifting starts here 
    C = A ; 
    for i = 1:n    
        C = [C(end) C(1:end-1)] ;    
    end
    isequal(C,B)  % check he code and inbuiltin function 
end

ans = logical
   1

ans = logical
   1

ans = logical
   1

ans = logical
   1

ans = logical
   1