Java program for factorial of a number

import java.util.*; public class W1 { public static void main(String[] args) { Scanner n=null; int a,b=1,c; n=new Scanner(System.in); System.out.println("ENter"); a=n.nextInt(); for(c=1;c<=a;c++) { b=b*c; } System.out.println(b); } }