REVIEW

a) 

a. if (v < 0) q = Math.sqrt(15);

b. if (count % 10 == 0) h = 3;

c. i = (x > 0) ? 7 : 8;

b) 

if (pH < 7) {
  neutral = 0;
	base = 0;
	acid = 1;
}
else if (pH > 7) {
	neutral = 0;
	base = 1;
	acid = 0;
}
else {
	neutral = 1;
	base = 0;
	acid = 0;
}

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1) 

switch(response) {
		case 'y': System.out.print("Your request is being processed"); break;
		case 'n': System.out.print("Thank you anyway for your consideration"); break;
		case 'h': System.out.print("Sorry, no help is currently available"); break;
		default: System.out.print("Invalid entry; please try again"); break;
}
System.out.println();

2)

switch(status) {
	case 200: System.out.print("OK (fulfilled)"); break;
	case 403: System.out.print("forbidden"); break;
	case 404: System.out.print("not found"); break;
	case 500: System.out.print("server error"); break;
}


3)

import java.util.Scanner;

public class Question5 {

    public static void main(String[] args) {
        //create Scanner obj
        Scanner sc = new Scanner(System.in);
        //prompt for input
        System.out.print("Input a month number: ");
        //validate input for month
        if (!sc.hasNextInt()) {
            System.out.println("Invalid! Enter a whole number.");
        } else {
            int monthNum = sc.nextInt(); //read in month
            //prompt for input
            System.out.print("Input a year: ");
            //validate input for year
            if (!sc.hasNextInt()) {
                System.out.println("Invalid! Enter a whole number.");
            } else {
                int year = sc.nextInt(); //read in year
               
                //initialize String to default N/A
                String month = "N/A";
               
                //initialize days to default 0
                int days = 0;
               
                //determine number of days in month
                switch (monthNum){
                    case 1, 3, 5, 7, 8, 10, 12 -> {
                        days = 31; //all these months have 31 days
                        if(monthNum == 1) month = "January";
                        else if (monthNum == 3) month = "March";
                        else if (monthNum == 5) month = "May";
                        else if (monthNum == 7) month = "July";
                        else if (monthNum == 8) month = "August";
                        else if (monthNum == 10) month = "October";
                        else if (monthNum == 12) month = "December";
                    }
                    case 4, 6, 9, 11 -> {
                        days = 30; //all these months have 30 days
                        if(monthNum == 4) month = "April";
                        else if (monthNum == 6) month = "June";
                        else if (monthNum == 9) month = "September";
                        else if (monthNum == 11) month = "November";
                    }
                    case 2 -> {
                        month = "February";
                        //leap year if divisible by 4 AND NOT 100 OR divisible by 400 (AND 100)
                        if((year % 4 == 0 && year % 100 != 0)||(year % 400 == 0)){
                            days = 29;
                        } else {
                            days = 28;
                        }
                    }
                    default -> System.out.println("Invalid entry. Not a month");
                }
               
                System.out.printf("%s %d has %d days%n", month, year, days);
               
            }
        }
    }
}

4)

import java.util.Scanner;

public class VoterEligibility {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("Enter your age : ");
        int age = input.nextInt();
        int res = (age >= 18) ? 1 : 0;
        switch (res) {
        case 0:
            System.out.println("Sorry, you are not eligible to vote.");
            break;

        case 1:
            System.out.printf("Congratulations! You are eligible to vote!");
            break;
        }
    }
}

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LAB 2 DISCUSSED IN CLASS

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