Testing for an Integer and displaying that value.

This is my task:

Write a program that accepts three parameters “lower_limit”, “upper_limit” and “factor”. The program should display all the numbers between “lower_limit” and “upper_limit” that are evenly divisible by “factor”

So I've been doing heaps of research as to why this isn't working and i've tried many different methods but I just cannot get this to work. It seems liek it should work! I've tried the mod(y,1) function. Everything. Please help. I've already tried something like this

z=floor(y)
  if (z==y); 
        disp(num2str(y))
else
end

So that wasn't working and I just needed to have something to turn into my teacher so the following is what I've turned in:

   ll=100;
  ul=500;
  f=5;
  x=(ll:ul);
  y=x/f;

if rem(y,1) == 0;
    disp(num2str(y))

else

end

Any help is GREATLY appreciated. This assignment is due in 30 minutes but i would still like to know why it's not working.

Answer 1

[George Papazafeiropoulos]

% initial data
ll=99;
ul=500;
f=5;
% engine
lb=floor(ll/f);
if lb/2~=floor(lb/2)
    lb=lb+1;
end
range=lb:f:ul;
range(2:2:end)=[];
% result
range