tomoliv30

(func $print_factorial (param $num i32)
  (call $factorial (local.get $num) (i32.const 1))
  (; omitted for clarity ;)
)

(func $factorial (param $num i32) (param $res i32) (result i32)
  (if (result i32) (i32.eqz (local.get $num))
    (then (return (local.get $res)))
    (else
      (return_call $factorial

tomoliv30

void print_factorial(uint32_t num)
{
  printf(“%u\n”, factorial(num, 1));
}

uint32_t factorial(uint32_t num, int res)
{
  if (num >= 1)
    return factorial(num - 1, res * num);
  return res;