cody challenge problem21 return the 3n+1 sequence for n 代码对比

function c = collatz(n)
i=1;
c(i)=n;
if n==1
return;
end
for i=1:99
      if mod(c(i),2)
          c(i+1)=3*c(i)+1;
      else
          c(i+1)=c(i)/2;
      end
      if c(i+1)==1
      return;
end
end

function c = collatz(n)
c = [];
  while n ~= 1
      c = [c,n];
      if mod(n,2)
          n = 3*n+1;
      else
          n = n/2;
      end
  end
  c = [c,1];
end