Unit3PracticeQuizModelAnswers.txt

// NOTE: You cannot run this entire text file at once in Java. Copy each model answer to IntelliJ to review.

// QUESTION 1

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner scnr = new Scanner(System.in);
        double temp;
        String sampleState;

        System.out.print("Please enter a temperature :");
        temp = scnr.nextDouble();

        if (temp <= 32) 
        {
            System.out.println("Solid");
        }
        else if (temp >= 212) 
        {
            System.out.println("Gas");
        }
        else 
        {
            System.out.println("Liquid");
        }
    }
}

// QUESTION 2

/*(100 > 250 || 110 > 100) && 50 >= 250 = False because the right half of the and is False, and if half of an And is False, the whole is False
= (False || 110 > 100) && 50 >= 250
= (False || True) && 50 >= 250
= True && 50 >= 250
= True && False
= False
*/

// QUESTION 3

public class Main {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        int selection;
        System.out.print("Please enter an int: ");

        if(scnr.hasNextInt())
        {
            selection = scnr.nextInt();

            switch(selection)
            {
                case 1:
                    System.out.println("First");
                    break;
                case 2:
                    System.out.println("Second");
                    break;
                default:
                    System.out.println("Invalid entry");
                    break;
            }

        }
        else
        {
            System.out.println("An integer value was not entered");
        }
    }
}

// QUESTION 4

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        String dayOfWeek = "";
        int weekNum = 0;
        boolean enteredIntFlag = true;

        System.out.print("Please enter Monday, Wednesday, or Friday: ");
        dayOfWeek = scnr.next();

        System.out.print("Please enter a number (7, 8, 9, or 10): ");

        if(scnr.hasNextInt())
        {
            weekNum = scnr.nextInt();

            if((weekNum == 7 || weekNum == 8) && (dayOfWeek.equals("Monday") || dayOfWeek.equals("Wednesday") || dayOfWeek.equals("Friday")))
            {
                System.out.println("The topic is loops.");
            }
            else if((weekNum == 9 || weekNum == 10) && (dayOfWeek.equals("Monday") || dayOfWeek.equals("Wednesday") || dayOfWeek.equals("Friday")))
            {
                System.out.println("The topic is arrays.");
            }
            else
            {
                System.out.println("Invalid Entry");
            }
        }
        else
        {
            System.out.println("Invalid Entry");
        }
    }
}