function save4($pv, $int, $n) { if ($n <= 0) { return $pv; } return save4($pv, $int, $n - 1) * (1 + $int); }
function save4($pv, $int, $n) { //use recursion by calling save 4 to calculate if ($n <= 0) { return $pv; } else { return save4($pv, $int, $n - 1) * (1 + $int); } }