BasicsExercises.java

package tech.bts.javaexamples;

/**
 * Basic exercises to practice variable declarations and assignments.
 */
public class BasicsExercises {

    public static void main(String[] args) {

        /*
        1. Declare a variable with type `int` and name `age`.
        2. Assign the value 15 to the variable `age`.
        */

        int age = 15;

        //3. Declare a variable with type `double` and name `weight`.

        //In the same line, assign the value `42.5` to that variable.

        // 4. Declare a variable `totalWeight` and assign the value of `weight` multiplied by 2.
        //    Decide what type you should choose for `totalWeight`.

        double weight = 42.5;
        double totalWeight = weight / 2;

        // 5. Declare a variable `year` and assign `2018` to it.

        int year = 2018;
        double price = 50.5;
        int quantity = 30;

        // 6. Declare the variables `price`, `quantity` and `totalPrice`.
        //    Assign any values to `price` and `quantity`, and calculate the value for `totalPrice`.

        // 7. Apply a discount of 5% to `totalPrice` and assign the result to `finalPrice`.
        // 8. Subtract 10 from `finalPrice` (change its value).

        double totalPrice = price * quantity;
        int discount = 5;
        double finalPrice = (totalPrice * discount) /100;
        finalPrice = finalPrice - 10;

        // 9. Declare a variable `productName` (type String) and assign somme value, e.g. "iPhone Xs".

        String productName;
        productName = "NiceBook";

        // 10. Declare a variable `message` and assign to it a message like "iPhone Xs costs 1500".
        //     That message should be created by joining the variables `productName` and `price`.

        String message;
        message = ("productName" + "costs" + "price");

        // 11. Declare a `boolean` variable named `applyDiscount` and assign the value `true`.
        // 12. Declare a `boolean` variable adult, that should have the result of comparing `age >= 18`.

        boolean applyDiscount = true;
        boolean adult = age >= 18;

        // 13. In a similar way, declare a variable `expensive`,
        //     which should have the result of comparing `price` and `1000`.

        boolean expensive = price >= 1000;

        // 14. Declare a variable `age2` with some value.
        //     Declare a variable `sameAge`, and assign the result of comparing `age` and `age2`.

        int age2 = 19;
        boolean sameAge = age == age2;

        // 15. Declare two integer variables `kids` and `cookies`, with some values (e.g. `5` and `22`)
        //     Calculate how many cookies each kid can have.
        //     Calculate how many cookies are left.

        int kids = 6;
        int cookies = 27;
        int cookiesPerKid = cookies / kids;
        int cookiesLeft = cookies % kids;

    }
}