Display its
factorial of a number
import
java.util.*;
class
factorial_number{
public static
void main(String args[]){
Scanner sc= new Scanner(System.in);
System.out.println("Enter
a number to perform factorial");
int
number=sc.nextInt();
Hello h= new
Hello();
if(number>=0)
{
System.out.println("The
factorial of given number is "+h.fact(number));
}
else
System.out.println("Invalid number");
}}
class Hello{
int fact(int n){
if(n==1 || n==0)
return 1;
else return
n*fact(n-1);
}}