factorial

class Main {
    public static void main(String[] args) {
       isFactorial(19.2);
    }

    public static void isFactorial(double num){
        long factorial = 1;
        if(num > 0 && num % 1 == 0.0){
            int i = 1;
            while (i <= num) {
            factorial = factorial * i;
            i++;
            
            }
                    System.out.println("Factorial of " + num + " = " + factorial);

        }
        else{
            System.out.println("Number should be greater than 0 and should be a integer");
            
        }
        
        
        
    }
}