Week 3 Classwork Solutions

WeekThreeCW.java

/**
 * This class contains the solutions to
 * the Week 3 classwork exercises.
 */
public class WeekThreeCW {

    public static void main(String[] args) {

        /* Problem 1: Using Relational Operators in Conditional Statements
        ------------------------------------------------------------------
        Write a program that does the following:
        - Create a variable called temperature that stores any number.
        - If the temperature is greater than 30, then print “Let’s go swim”
        - If the temperature is less than 30, then print “The pool is too cold”
        - Hint: you will need to use a relational operator and a conditional statement
         */

        System.out.println("\nClasswork Problem 1:\n"); // to separate Problems

        double temp1 = 35;
        double temp2 = 29.9;

        double temperature = temp1; // replace with temp2 to see what happens

        // if the temp is greater than 30
        if (temperature > 30) { // Using the ">" (greater than) relational operator
            System.out.println("\tLet's go swim");
        }
        // anything else - the temp is less than 30
        else {
            System.out.println("\tThe pool is too cold");
        }

        /* Problem 2: Using Logical Operators in Conditional Statements
        ---------------------------------------------------------------
        Write a program that does the following:
        - If I am 18 or older OR if I am at least 17 with a 100 as my grade
          print “I can go to college”
        - If neither of those is met, print “I can’t go to college”
        - Hint: Use two int variables, one for age and one for grade!
         */

        System.out.println("\nClasswork Problem 2:\n"); // to separate Problems

        int a1 = 20; // examples for age
        int a2 = 17;

        double g1 = 85.4; // examples for grade
        double g2 = 100;

        int age = a1; // replace with a2 to see what happens
        double grade = g1; // replace with g2 to see what happens

        // if age is at least 18 OR if age is at least 17 AND grade equals 100
        if (age >= 18 || (age >= 17 && grade == 100)) { // Using the && (and) logical operator
            System.out.println("\tI can go to college");
        }
        // anything else - student's age is less than 17 OR
        // the student's age is 17 with a grade that is not 100
        else {
            System.out.println("\tI can't go to college");
        }


    }

}