Factorial Number Solver Using Exception in Java

A very simple program that I wrote using Java that will ask the user to give a number and then our program will compute it's factorial value using exception handling to check for invalid entries.

I am currently accepting programming and web development work kindly contact me in the following email address for further details. Thank you.

My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com.

My mobile number here in the Philippines is 09173084360.

My telephone number at home here in Bacolod City, Negros Occidental Philippines is  +63 (034) 4335675.

Sample Program Output

Program Listing

FactorialNumber.java

package exceptiondemo;

import java.util.Scanner;

import java.util.InputMismatchException;

/**

 * NetBeans IDE 8.2

 * @author Mr. Jake R. Pomperada

 * March 20, 2018  Tuesday

 * Bacolod City, Negros Occidental

 */

public class FactorialNumber {

   public static void main(String[] args) {

        

        Scanner sc=new Scanner(System.in);

              int n, c, fact = 1;

               boolean goodData = false;

                

              while(!goodData) {

              try {

                System.out.print("FACTORIAL NUMBER SOLVER USING EXCEPTION");

                System.out.println("\n");

                System.out.print("Give a Number  : ");

int num_value =sc.nextInt();

                

                 if (num_value < 0) {

                 System.out.println("Number should be non-negative.");

                 }

             else

                {

              for (c = 1; c <= num_value; c++) {

                  fact = (fact * c);

    

                 }

               System.out.println("Factorial value of  "

                        + num_value +" is  "+fact +".");

                }  

                System.out.println("\n");

goodData = true;

       

              } catch(InputMismatchException e) {

            

                sc.next();

                System.out.println("You Entered a Bad Data." );

                System.out.println("Please Try Again." );

                System.out.println("\n");

                }

            }  // while loop end

System.out.print("\t END OF PROGRAM");

        System.out.println("\n");

     }

}