C # PROGRAMI İLE ÖRNEK SORULAR-4

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace faktöriyel

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int i;

            double sayi, fakt = 1;

            sayi = Convert.ToDouble(textBox1.Text);

            for (i = 1; i <= sayi; i++)

            {

                fakt = fakt * i;

            }

            textBox2.Text = fakt.ToString();

        }

    }

}