Help,Subtracting two unequal vectors gives a zero vector? Is MATLab wrong?

hello

I want to ask you a question about the code that I did. I want to get the equilibrium y to do that, I subtracted two consecutive terms inorder to get a zero n-vector

In my code, when I do a while loop, the equivalent y is 82 but when I subtract the consecutive of the last two terms 81 and 82 I donot get a zero vector but 1 element of this vector zero. I think Matlab considered it as a true case when just 1 element was equal.

I tried doing it using the for loop for example till 250, the equilibrium y was at 183 way far than the 82.

What should I change in the code to make it stop at 183 noting that I am required to plot till equilibrium is reached ( that means using the while loop.)

function [Nt,xe,ye]= PopulationProgress(x,L)

%x=[200000,300000,500,1500]'

i=1;

n=length(x);

temp1=x;

temp2=L*temp1;

Z=zeros(n,1);

while (round(temp1)-round(temp2))~=Z

    Nt(:,i)=round(temp1);

    Nt(:,i+1)=round(temp2);

    temp1=round(temp2);

    Y=L*temp1;

    temp2=round(Y);

    i=i+1;

end;

%for i=1:250

   % Nt(:,i)=round(temp1);

   % Nt(:,i+1)=round(temp2);

   % temp1=round(temp2);

%  Z=L*temp1;

 %   temp2=round(Z);

%end

ye=i;

xe=Nt(:,i);