factorial_2_4_4.java

//problem 2.4.3
        // factorial_2_4_3.java: write a program tha takes an integer n and calculate n! 
import java.util.Scanner;
class factorial_2_4_4
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        int  fact = 1;
        if(num<1)
            System.out.println("Enter a valid number...");
        else if(num == 1)
            System.out.println("Factorial value of "+num+" 1");
        else
        {
            while(num>0)
            {
                fact = fact*num;
                num--;
            }
        }
        System.out.println("factorial value if"+fact);
    }
}