% built in factorial
printf("%d\n", factorial(50));

% let's define our recursive...
function fact = my_fact(n)
  if ( n <= 1 )
    fact = 1;
  else
    fact = n * my_fact(n-1);
  endif
endfunction

printf("%d\n", my_fact(50));

% let's define our iterative
function fact = iter_fact(n)
  fact = 1;
  for i = 2:n
    fact = fact * i;
  endfor
endfunction

printf("%d\n", iter_fact(50));