Question

Use switch statement,write a menu driven program to:

(i) To find and display all the factors of a number input by the user (including 1 and excluding number itself.)
Example :
Sample Input : n = 15.
Sample Output : 1, 3, 5

(ii) To find and display the factorial of a number input by the user. The factorial of a non-negative integer n ,denoted by n!,is the product of all integers less than or equal to n.
Example :
Sample Input : n = 5
Sample Output : 120.

For an incorrect choice, an appropriate error message should be displayed.

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Code

				
					import java.util.Scanner;

public class program9
{
	public static void main(String[] args)
	{
	    int i=0,n=0,factorial=0;
		Scanner sc = new Scanner(System.in);
		System.out.println("press 1 for Factors");
		System.out.println("press 2 for Factorial");
		System.out.print("Enter your choice: ");
		int choice = sc.nextInt();
		switch (choice)
		{
			case 1:
				System.out.print("Enter a number: ");
				n = sc.nextInt();
				for (i = 1; i < n; i++)
				{
					if (n % i == 0)
					{
						System.out.println(i);
					}
				}
				break;
			
			case 2:
				System.out.print("Enter a number: ");
				n = sc.nextInt();
				factorial = 1;
				for (i = 1; i <= n; i++)
				{
					factorial = factorial * i;
				}
				System.out.println("Factorial: " + factorial);
				break;
			
			default:
				System.out.println("Invalid choice");
				break;
		}
	}
}