Practice Challenges for Fun

Explore Java practice challenges designed to strengthen your understanding of multiway decisions using nested if and switch statements. Learn to write code that handles user input, converts hexadecimal to decimal, and creates control flow for real-world problems.

We'll cover the following...

- Quiz
- Challenge 1: Read an answer to a question and react to it
- Challenge 2: Hexadecimal to decimal conversion
- Challenge 3: Create a message for a café sign
- Challenge 5: Create a string representation of a number
- Challenge 6: React to a user’s response
- Challenge 7: Dice game

Consider the following if statement:

if (x > 2)
{
   if (y > 2)
   {
      z = x + y;
      System.out.println("z is " + z);
   }
}
else
   System.out.println("x is " + x);

What is displayed when the values of x and y are 3 and 2, respectively?

Nothing is displayed

x is 2

z is 7

Error

1 / 3

Assume that the int variable sumCode has been assigned a value. Rewrite the following multiway if statement as a switch statement:

if (sumCode == 1)
   sum = sum + 2.5;
else if (sumCode == 2)
   sum = sum + 5.0;
else if (sumCode == 3)
   sum = sum + 7.5;
else if (sumCode == 4)
   sum = sum + 10.0;
else
   sum = 0;

Show Answer

1 / 3

1.A First Look at Java

2.Arithmetic Expressions

3.Debugging Interlude—The Errors Programmers Make

4.Using Classes and Objects

5.Class Definitions—The Fundamentals

6.Debugging Interlude—Common Mistakes with Classes

7.Decisions

8.Class Definitions—More Details

9.Multiway Decisions

10.Debugging Interlude—Avoiding Mistakes; Finding Mistakes

11.Repetition

12.Repetition Continued

13.Debugging Interlude—Debugging Loops

14.Arrays

15.An Array-Based Data Structure

16.Debugging Interlude—Debugging Arrays

17.Glossary

18.Appendixes

19.Copyright

Practice Challenges for Fun

Quiz

Challenge 1: Read an answer to a question and react to it