using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
int i, s = 1;
for (i = 1; i <= 7; i = i + 1)
s = s * i;
Console.WriteLine("7!:{0}",s);
Console.Read();
}
}
}
s = s * i;
Console.WriteLine("7!:{0}",s);
Console.Read();