Hello my friends at Chegg, I\'m in need of your help once again writing a java p

Question

Hello my friends at Chegg, I'm in need of your help once again writing a java program. I don't know what it is, but this java stuff has me lost in the sauce, so I'm grateful fo you guys at Chegg. That said I need to write a program using a Switch/Case block that executes depending upon menu choice, and use a for loop to determine and output the data, and lastly Implement a do...while loop to run the program again.

In mathematics, the factorial of a positive integer n^1 (written as n!) is the product of all positive integers less than or equal to n. For example:

5! = 5 * 4 * 3 * 2 * 1 = 120

This week, you will write a simple program that will determine factorial values of positive integers.

Write a program that will determine the factorial values of integers starting with the number 1 and display all factorials up to a user inputted value.

Constraints
Factorials and their results are displayed as such: 4! = 24

Requirements

Display an opening welcome statement and menu as such:

Welcome to my factorial program!

Please choose from the following:

1. Run Program

2. Exit Program

Use a Switch/Case block that executes depending upon menu choice

Use a for loop to determine and output the data

Implement a do...while loop to run the program again

This program will utilize code learned from Week 1 through Week 5

Hints

As you can see by the example output below, the factorials can grow exponentially so be mindful of this when you make your variable declarations (Google BigInteger)

Notice that the factorial begins at 1 and there are 10 values returned when the user requested 10. This requested number can be larger or smaller depending on user input

Notice how some of the output instructions, welcome, menu, etc. are not repeated in the second run

Expected Output

On the next page, you will find an output sample for two runs of the program. User input is in BOLD

Run 1:

Welcome to my factorial program! Please choose from the following:

1. Run Program
2. Exit Program

:1

This program will determine the factorial value of positive integers.

The starting number is 1.
Please enter an ending integer value: 10
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5040
8! = 40320
9! = 362880
10! = 3628800
Run factorial program again? (Y for Yes, N for No): y

Run 2: (User entered y above to run the program again)

The starting number is 1.
Please enter an ending integer value: 5
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
Run factorial program again? (Y for Yes, N for No): n

Thank you for using the factorial program! Goodbye!

Explanation / Answer

import java.util.*;

class FactorialTest
{
   public static void main (String[] args)
   {
   Scanner scan = new Scanner(System.in);
       System.out.println("Welcome to my factorial program! Please choose from the following:");
      
System.out.println("1. Run Program");
System.out.println("2. Exit Program");
  
int option = scan.nextInt();
String Cont ="C";
  
switch(option)
{
case 1 :
System.out.println("This program will determine the factorial value of positive integers.");
do
{
System.out.println("The starting number is 1.");
System.out.println("Please enter an ending integer value:");
int n = scan.nextInt();
for(int i=1;i<=n;i++)
{
System.out.println(i+"! = "+fact(i));//call to function
}
System.out.println("Run factorial program again? (Y for Yes, N for No): ");
Cont = scan.next();
if(Cont.equals("N"))
break;
  
}while(Cont.equals("Y"));// do while loop
break;
  
case 2:
System.exit(0);
default: System.out.println("Invalid option");
break;
  
  
}
  
   }
   static long fact(int x)
   {
   long f = 1;
   for(int i=1;i<=x;i++)
   {
   f = f*i;
   }
   return f;
   }
}

Output:

Welcome to my factorial program! Please choose from the following:
1. Run Program
2. Exit Program

1
This program will determine the factorial value of positive integers.
The starting number is 1.
Please enter an ending integer value:10
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5040
8! = 40320
9! = 362880
10! = 3628800
Run factorial program again? (Y for Yes, N for No): Y
The starting number is 1.
Please enter an ending integer value:5
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
Run factorial program again? (Y for Yes, N for No): N

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