I\'m in java one and I need help with this code. please follow the instructions

Question

I'm in java one and I need help with this code. please follow the instructions and help me this program. thank you

Programming Concepts

1. Arrays

Assignment Description

You will write a program that will calculate an array of factorials and print it out.
In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers

less than or equal to n.

For example:

7! = 1 * 2 * 3 * 4 * 5 * 6 * 7 = 5040.

3! = 1 * 2 * 3 = 6.

Also, it is a mathematical property that 0! = 1.

To further explain how we calculate factorials for the assignment, note that to find 4!, we can do 4! = 4 * 3 * 2 * 1

Remember that 2! Is 2 * 1. So we can also do 4! = 4 * 3 * (2 * 1)

4! = 4 * 3 * 2!
Also, 3! Is 3 * 2 * 1. But remember that (2 * 1) is also 2!, so 3! can be calculated by doing 3 * 2!.

4! = 4 * 3!

This is true for any factorial. So 7! =7*6!

10! = 10 * 9!

Assignment Requirements

Assume that the user will enter a non-negative integer.

You must use an array that will hold the factorials.

Assignment Suggestions

-Prompt the user to enter the number of factorials to calculate.

-Create a new int array, whose size is the number of factorials to calculate, which was retrieved from the user earlier.

-Assign the first element of the array to 1.

-Loop from 1 to the end of the factorials array

a. Set the current element of the factorials array equal to the element before the current element (current element – 1), multiplied by the counter of the loop.

- Loop from 0 to the end of the factorials array
a. Print the data, like the sample output below.

sample output

user@loki:~$ java Factorial
Enter the number of factorials to calculate: 14

0! = 1
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120

6! = 720
7! = 5040
8! = 40320
9! = 362880

10!=3628800

11! = 39916800

12!=479001600

13!=6227020800

Explanation / Answer

import java.util.*;
import java.lang.*;
import java.io.*;

class arrayfact
{
   public static void main(String arg[])
   {
       int a[] = new int[arg.length];
       int i, f , n, x=0;
       while(x<arg.length)
       {
           for(i = 0 ; i < x ; i++)
           a[i] = x;
           for(i = 0 ; i < x ; i++)
           {
               n = a[i];
               for(f = 1 ; n > 1 ; n--)
               f = f*n;
               System.out.println("No : "+a[i]+" Factorial is " +f);
           }
       x++;
       }
   }
}

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