calculate factorial of number

 

public class factorial {
    public static void main(String[] args) {
        int num = 6;
        int fact = 1;
        int temp=num;
        while (num > 0) {
            fact = fact * num;
            num--;
        }
        System.out.println("The factorial of " + temp + " is : " + fact);
    }
}

Output : The factorial of 6 is : 720