// Factorial.java
// This program calculates a factorial of an entered integer


public class Factorial {        

public static void main ( String[] args ) {     

        int a,b=1,c,fc;
        
        Integer in = new Integer(Integer.parseInt(args[0]));
        fc = in.intValue();
        a = fc;
        do{
           b = b* fc;
           c = b;
           fc--;
        }while(fc > 0 );
                        
        System.out.println("The factorial of " + a + " is " + b);       
        System.out.println();           
        }
}