NumChecker.java

NumChecker.java

package com.company;

import java.util.Scanner;

public class Main {

        public static void main(String ... args) {
                    int number;
                    int answer = 0;
                    boolean boo = true;
                    int simple;
                    Scanner scanner = new Scanner(System.in);
                    System.out.println ("Enter Your valid number please:");  // You should enter Your valid integer


                    while (!scanner.hasNextInt()){
                        System.out.println("Enter valid number:");// When You entered NOT valid integer
                        scanner.nextLine();

                    }


                    simple = scanner.nextInt();
                    scanner.nextLine();

                    do{  // this "if" statement checks whether the number is Prime or Not Prime
                        System.out.println("\n/////// MENU ///////");
                        System.out.println("1. Yout number even or odd?");
                        System.out.println("2. Yout number prime?");
                        System.out.println("3. Yout number positive or negative?");




                        if (answer > 0) {
                            System.out.println("4.Exit");
                        }
                        do {
                            System.out.print("\n Enter Your valid number please:");


                            while (!scanner.hasNextInt()) {
                                System.out.println("Incorrect valid number, please enter Your number again:");
                                scanner.nextLine();

                            }
                            number = scanner.nextInt();
                            scanner.nextLine();
                        } while ( number <= 0 || (boo && number > 3)  || (!boo&& number > 4));



                        if(boo) {
                            boo = false;
                        }

                        // this "if" statement checks whether the number is even or odd
                        if (number == 1){
                            if (simple % 2 == 0){
                                System.out.println("Your number "+ simple + " Even");

                            }else {
                                System.out.println("Your number "+ simple + " Odd");
                            }
                            answer++;

                        }

                        // this "if" statement checks whether the number is Prime or Not Prime

                        if (number == 2){
                            String check = simple + " Prime";
                            if(simple < 2 ) {
                                check = simple +" NOT Prime";
                            } else {
                                for (int a = 2; a < simple; a++) {
                                    if(simple % a == 0){
                                        check = simple +" NOT Prime";
                                        break;
                                    }
                                }
                            }
                            System.out.println ("Your number: " + check);
                            answer++;
                        }

                        // this "if" statement checks whether the number is Positive, Negetive or Zero

                        if (number == 3){
                            if(simple > 0){
                                System.out.println("Your number "+ simple + " Positive");
                            } else if (simple < 0){
                                System.out.println("Your number "+ simple + " Negative");
                            } else {
                                System.out.println("Your number "+ simple + " Zero");
                            }
                            answer++;
                        }



                    } while( number != 4 ); // touched chapter "4.Exite" this "while" closed this program and say "Have a good day, Bye"
                    System.out.println("Have a good day, Bye");




                }
            }