How can I break this while loop and store the data?

Hi! I'm trying to generate a collatz sequence for any n and to stop when n == 1. I used the following:

n=7
while n>1
    if mod(n, 2)==0
        n = n/2
    end
    if mod(n,2)~=0
        n = (3.*n)+1
    end
  
end

I thought it would stop generating when n reached 1, given the conditions for the while loop, but it just doesn't. As a result, it keeps running forever and matlab can't handle it and the site closes. I tried adding

if n==1
    break
end

right after "while n>1" but it doesn't work either. I also want to store the sequence generated (which will vary in size depending on the value of n) and I don't know how to.

Thanks in advance!!

Answer 1

[Alex Mcaulley]

Try with this:

n = 7;
iter = 1;
seq(1) = n; %where the sequence is stored
while n > 1
    if mod(n, 2)==0
        n = n/2;
    elseif mod(n,2)~=0
        n = (3.*n) + 1;
    end
    iter = iter + 1;
    seq(iter) = n;
end

[Alicia Cuber Caballero]

Works perfectly! Thank you very much :)