using System; static class utility { public static int factorial(int i) { int temp; if (i==0) return(1); else temp=i*factorial(i-1); return(temp); } } class use_utility { static int Main() { int i=0; int f=0; string line; Console.WriteLine(" Type in an integer"); line=System.Console.ReadLine(); i=int.Parse(line); f=utility.factorial(i); Console.WriteLine(" {0,6}! = {1}",i,f); return (0); } }//