Java Intermediate: 07/04/2021

Main.java

package com.javafx.test;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
	    starWars();
	    printSum();
	    if(isPrime()){
            System.out.println("The number is prime");
        }
	    else{
            System.out.println("The number is not prime");
        }
        System.out.println("Enter a number to find its factorial: ");
        int b = scanner.nextInt();
        System.out.println(fact(b));
    }
    public static void starWars() {
        System.out.println("May the Force be with you");
    }
    public static void printSum() {
        Scanner input = new Scanner(System.in);

        // prompt user to enter 2 numbers
        System.out.print("Enter number 1: ");
        double num1 = input.nextDouble();
        System.out.print("Enter number 2: ");
        double num2 = input.nextDouble();

        double sum = num1 + num2;

        // print the sum of those numbers
        System.out.println("Sum: " + sum);
    }
    public static boolean isPrime()
    {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter a number to check if it's prime: ");
        int number = input.nextInt();
        for(int i = 2; i < number; i++)
        {
            if(number % i == 0)
            {
                return false;
            }
        }

        return true;
    }
    public static int fact(int x){
        if(x == 0 || x == 1){
            return 1;
        }
        else{
            return fact(x-1)*x;
        }
    }
}