Having a hard time trying to transform this function in a for loop

Guys, I made a code to transform decimal numbers into their binary form. I know that MATLAB have this function (dec2bin), but I had to write down my own code

I had to do this in two different ways: using a while loop and using a for loop

After days, I managed to make the code using while, but I'm just stucked in making the for one.

function bin=dec8(d)
i=1;
q=floor(d/2);
r=rem(d,2);
bin(i)=num2str(r(i));
while q>=2
    d=q;
    i=(i+1);
    q=floor(d/2);
    r=rem(d,2);
    bin(i)=num2str(r);
end

bin(i+1)=num2str(q);
bin=fliplr(bin);

I have to make "q" go from (d/2) to 2 and correlates that with the vector sequence, but how?

[luc]

Hey Daniel!

This might be considered cheating the assignment but try the command

open dec2bin

and see if the code makes sense!

Answer 1

[Guillaume]

Your while loop stops after you've divided the original number by 2 enough times to reach 0. To convert to a for loop you need to know before hand how many times that's going to be.

log2 will tell you that.