Iterativt vs rekursivt

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp10
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnIterativt_Click(object sender, EventArgs e)
        {
            int n = int.Parse(txtInput.Text);
            int temp = iterativt(n);
            lblUd.Text = temp.ToString();
        }

        private void btnRekursivt_Click(object sender, EventArgs e)
        {
            int n = int.Parse(txtInput.Text);
            int temp = rekursivt(n);
            lblUd.Text = temp.ToString();
        }

        int iterativt(int n)
        {
            int sum = 1;

            for (int i = 1; i <= n; i++)
            {
                sum = sum * i;
            }

            return sum;
        }

        int rekursivt(int n)
        {
            if (n == 1) return 1;
            else
                return n * rekursivt(n - 1);
        }
    }
}