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"); } } }