Java

REVIEW TOPIC 02 – IF STATEMENTS

LESSON WORK

QUESTION 1 - DIVISIBILITY

Create a program that asks the user for a number and outputs whether that number can be divided by three or not.

Hint: If a number modded by 3 gives a remainder of zero, then it is divisible by three.

Sample I/O #1:

Enter a number.

36

The number 36 is divisible by 3.

Sample I/O #2:

Enter a number.

998

The number 998 is not divisible by 3.

Save your work inside a file called Q1.java inside the folder called Topic02.

QUESTION 2 - THAT’S ODD

Create the classic odd or even program that asks the user for a number and outputs whether that number is an even number or an odd number.

Sample I/O #1:

Enter a number.

11

You are odd.

Sample I/O #2:

Enter a number.

14

Wow, you are not as odd as I thought. :)

Save your work inside a file called Q2.java inside the folder called Topic02.

QUESTION 3 – IN OR OUT

Create the program that gets a point value from the user and outputs whether or not that point is inside the green rectangle seen the image below.

Sample output:

Enter the value of x.

7

Enter the value of y.

2

The point (7, 2) is outside of the rectangle.

Save your work inside a file called Q3.java inside the folder called Topic 02.

QUESTION 4 – RANDOM REMINDER

Write a program that generates a random number between 1 and 6 inclusively. Test your program many times to make sure that each possible value is generated at least once.

You can use the random function in the Math class to generate a random number.

Save your work inside a file called Q4.java inside the folder called Topic 02.

QUESTION 5 – TAX BRACKET

In Canada (and in many other parts of the world), a person’s income is taxed. This is called income tax. The amount of income tax you pay is based on the amount of money you make in a calendar year. Furthermore, the amount of money you make is taxed at different rates based on brackets.

Here are the tax brackets we will use for this problem:

First $25,000 in salary	0%
Over $25,000 up to $50,000	20%
Over $50,000, up to $75,000	30%
Over $75,000, up to $100,000	35%
Over $100,000	40%

Examples:

A person that makes $40,000 a year will pay 0% on the first $25,000 and 20% on the remaining $15,000 which amounts to 0$ + $3000 = $3000.

A person that makes $120,000 a year will pay 0% for the first $25,000, 20% for the next $25,000, 30% for the next $25,000, 35% for the next $25,000 and finally 40% for the remaining $20,000. That’s a total of 0 + $5000 + $7500 + $8750 + $8,000 for a total of $29,250.

You will write a program that will ask a user for their income and the program will output the amount of income tax they must pay based on the above tax bracket table.

Save your work inside a file called Q5.java inside the folder called Topic 02.

GOT EXTRA TIME?

If you have extra time, take a few minute to look up Ontario and Canada’s income tax brackets. Unfortunately, they do not match so you would have to calculate the provincial income tax and the federal income tax separately.

If you have time, write the program that would do this.

If you did do this, save your work inside a file called Q5B.java inside the folder called Topic 02.

QUESTION 6 – VARIANT CRAPS GAME

The program in the previous question can be used to represent the rolling of a 6-sided dice.

Create a program that simulates two die being rolled. When the total is either 7 or 11, the program outputs “Winner winner chicken dinner”. If the die are both the same, the program outputs “Roll again”. Otherwise, it outputs “You lose.”

Save your work inside a file called Q6.java inside the folder called Topic 02.