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Activity 2.4 Nesting Code Blocks

Introduction

Activity 2.4

Nesting Code Blocks

Topics

Nesting Code Blocks: Building Complex Logic
Demo: Confirm Account Deletion
Importance of Code Formatting

Nesting Code Blocks: Building Complex Logic

Nesting is the process of placing one set of instructions (a code block) inside another.

This technique is crucial for making decisions based on previous selections, which is common in even basic programs.

Demo: Confirm Account Deletion

1
System.out.print("Would you like to delete your account?");
2
String answer = input.nextLine();
3

4
if (answer.equals("yes")) {
5
    System.out.print("Are you ABSOLUTELY SURE?");
6
    String confirm = input.nextLine();
7

8
    if (confirm.equals("yes")) {
9
        System.out.println("Deleting your account.");
10
    }
11
    else {
12
        System.out.println("Cancelling your request.");
13
    }
14
}

Demo: Confirm Account Deletion

1
System.out.print("Would you like to delete your account?");
2
String answer = input.nextLine();
3

4
if (answer.equals("yes")) {
5
    System.out.print("Are you ABSOLUTELY SURE?");
6
    String confirm = input.nextLine();
7

8
    if (confirm.equals("yes")) {
9
        System.out.println("Deleting your account.");
10
    }
11
    else {
12
        System.out.println("Cancelling your request.");
13
    }
14
}

The inner block of code only executes if the condition for the outer block is first met.

Demo: Confirm Account Deletion

1
System.out.print("Would you like to delete your account?");
2
String answer = input.nextLine();
3

4
if (answer.equals("yes")) {
5
    System.out.print("Are you ABSOLUTELY SURE?");
6
    String confirm = input.nextLine();
7

8
    if (confirm.equals("yes")) {
9
        System.out.println("Deleting your account.");
10
    }
11
    else {
12
        System.out.println("Cancelling your request.");
13
    }
14
}

1
Would you like to delete your account? yes [Enter]
2
Are you ABSOLUTELY SURE? yes [Enter]
3
Deleting your account.

Importance of Code Formatting

It's crucial to keep your code nicely formatted. Good formatting makes code easier to read, understand, and debug.

1. Indentation: Always indent one tab for every code block. If you have a nested block, the code in the nested block should be indented again. This visually shows the level of nesting.

2. Grouping Statements: if, else if, and else statements that belong together should not have space between them. Group them together to visually indicate that they are related.

Importance of Code Formatting

3. Spacing Sections: Space your code based on logical sections. Avoid bunching up your entire program; this makes it much easier to read and isolate issues when debugging.

Key Terms

Nesting: Placing one statement or block of code inside another.

'F' → Fullscreen

Objectives

Nesting if statements
Testing nested branching statements

Activity Tasks

Create a new project named 2-4-Nesting.
Complete each task individually.

Task 1: Initialize Data

Initialize the variables for the game.
- The two ending variables are initialized to false. If the use survives one of the scenarios, the variable is changed to true, which will be used to select an ending.
- The player can pick up items an accumulate gold.

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11
    }
12
}

Task 2: Prologue

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
6 collapsed lines
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11

12
        // Prologue -----------------------------------------------------------------------------
13
        System.out.println("Your car crashes into a tree during a thunderstorm in the woods.");
14
        System.out.println("Darkness surrounds you as thunder crashes and rain pours.");
15
        System.out.println("You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.");
16
        System.out.println("Inside, you see two shadowy paths diverging deeper into the unknown...\n");
17

18
        // Convert a string to lowercase using String.toLowerCase()
19
        System.out.print("Which path do you take? (left or right) -> ");
20
        String path = input.nextLine().toLowerCase();
21

22
        if (path.equals("left") || path.equals("right")) {
23
            System.out.println("\nAs you move forward, you see something glimmering on the ground — a Hostess Twinkie.");
24
            System.out.println("Do you eat the Twinkie for sustenance, or will you save it for later?");
25

26
            System.out.print("(take or eat) -> ");
27
            String twinkieChoice = input.nextLine().toLowerCase();
28

29
            if (twinkieChoice.equals("take")) {
30
                System.out.println("You slip the Twinkie into your pocket, unsure what awaits in the darkness...\n");
31
                twinkies += 1;
32
            }
33
            else if (twinkieChoice.equals("eat")) {
34
                System.out.println("Feeling uneasy, you eat the Twinkie to keep up your strength.\n");
35
            }
36
            else {
37
                System.out.println("You leave the Twinkie untouched, feeling an ominous presence watching.\n");
38
            }
39
        }
40
    }
41
}
42
//

Task 3: Construct Selection Statements for Main Levels

Each code block will be completed individually. Take care to keep track of what section you are working on.

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
35 collapsed lines
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11

12
        // Prologue -----------------------------------------------------------------------------
13
        System.out.println("Your car crashes into a tree during a thunderstorm in the woods.");
14
        System.out.println("Darkness surrounds you as thunder crashes and rain pours.");
15
        System.out.println("You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.");
16
        System.out.println("Inside, you see two shadowy paths diverging deeper into the unknown...\n");
17

18
        // Convert a string to lowercase using String.toLowerCase()
19
        System.out.print("Which path do you take? (left or right) -> ");
20
        String path = input.nextLine().toLowerCase();
21

22
        if (path.equals("left") || path.equals("right")) {
23
            System.out.println("\nAs you move forward, you see something glimmering on the ground — a Hostess Twinkie.");
24
            System.out.println("Do you eat the Twinkie for sustenance, or will you save it for later?");
25

26
            System.out.print("(take or eat) -> ");
27
            String twinkieChoice = input.nextLine().toLowerCase();
28

29
            if (twinkieChoice.equals("take")) {
30
                System.out.println("You slip the Twinkie into your pocket, unsure what awaits in the darkness...\n");
31
                twinkies += 1;
32
            }
33
            else if (twinkieChoice.equals("eat")) {
34
                System.out.println("Feeling uneasy, you eat the Twinkie to keep up your strength.\n");
35
            }
36
            else {
37
                System.out.println("You leave the Twinkie untouched, feeling an ominous presence watching.\n");
38
            }
39
        }
40

41
        // Caves -----------------------------------------------------------------------------
42
        // Left -> Wolfpack
43
        // Right -> Dragon
44
        // Else -> No path chosen
45
        if (path.equals("left")) {
46

47
        }
48
        else if (path.equals("right")) {
49

50
        }
51
        else {
52

53
        }
54
    }
55
}
56
//

Task 4: Wolfpack Level

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
35 collapsed lines
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11

12
        // Prologue -----------------------------------------------------------------------------
13
        System.out.println("Your car crashes into a tree during a thunderstorm in the woods.");
14
        System.out.println("Darkness surrounds you as thunder crashes and rain pours.");
15
        System.out.println("You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.");
16
        System.out.println("Inside, you see two shadowy paths diverging deeper into the unknown...\n");
17

18
        // Convert a string to lowercase using String.toLowerCase()
19
        System.out.print("Which path do you take? (left or right) -> ");
20
        String path = input.nextLine().toLowerCase();
21

22
        if (path.equals("left") || path.equals("right")) {
23
            System.out.println("\nAs you move forward, you see something glimmering on the ground — a Hostess Twinkie.");
24
            System.out.println("Do you eat the Twinkie for sustenance, or will you save it for later?");
25

26
            System.out.print("(take or eat) -> ");
27
            String twinkieChoice = input.nextLine().toLowerCase();
28

29
            if (twinkieChoice.equals("take")) {
30
                System.out.println("You slip the Twinkie into your pocket, unsure what awaits in the darkness...\n");
31
                twinkies += 1;
32
            }
33
            else if (twinkieChoice.equals("eat")) {
34
                System.out.println("Feeling uneasy, you eat the Twinkie to keep up your strength.\n");
35
            }
36
            else {
37
                System.out.println("You leave the Twinkie untouched, feeling an ominous presence watching.\n");
38
            }
39
        }
40

41
        // Caves -----------------------------------------------------------------------------
42
        // Left -> Wolfpack
43
        // Right -> Dragon
44
        // Else -> No path chosen
45
        if (path.equals("left")) {
46
            System.out.println("You cautiously take the left path.");
47
            System.out.println("A few steps in, you freeze as the piercing eyes of a pack of wolves emerge from the shadows.");
48
            System.out.println("The pack leader, larger and fiercer than the others, steps forward, growling softly...\n");
49

50
            System.out.print("Do you offer the pack leader your hand in peace? (yes or no) -> ");
51
            String wolfChoice = input.nextLine().toLowerCase();
52

53
            if (wolfChoice.equals("yes") && twinkies >= 1) {
54
                System.out.println("As you reach out, the wolves smell the Twinkie...");
55
                System.out.println("In a frenzy of hunger, they turn on you, and you're surrounded with no escape!\n");
56
            }
57
            else if (wolfChoice.equals("yes")) {
58
                System.out.println("The pack leader sniffs your hand and accepts you into the fold.");
59
                System.out.println("You're given a small satchel of gold as a token of their trust.");
60
                System.out.println("You settle in with the wolves, awaiting dawn as the storm howls outside...\n");
61
                gold += 5;
62
                wolfpackEnding = true;
63
            }
64
            else {
65
                System.out.println("Sensing your hesitation, the wolves close in, their teeth bared.");
66
                System.out.println("You feel their claws sink in, and everything goes black...\n");
67
            }
68
        }
69
        else if (path.equals("right")) {
70

71
        }
72
        else {
73

74
        }
75
    }
76
}
77
//

Task 5: Dragon Level

Warning! Take your time with this section. There are multiple levels of nested blocks.

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
35 collapsed lines
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11

12
        // Prologue -----------------------------------------------------------------------------
13
        System.out.println("Your car crashes into a tree during a thunderstorm in the woods.");
14
        System.out.println("Darkness surrounds you as thunder crashes and rain pours.");
15
        System.out.println("You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.");
16
        System.out.println("Inside, you see two shadowy paths diverging deeper into the unknown...\n");
17

18
        // Convert a string to lowercase using String.toLowerCase()
19
        System.out.print("Which path do you take? (left or right) -> ");
20
        String path = input.nextLine().toLowerCase();
21

22
        if (path.equals("left") || path.equals("right")) {
23
            System.out.println("\nAs you move forward, you see something glimmering on the ground — a Hostess Twinkie.");
24
            System.out.println("Do you eat the Twinkie for sustenance, or will you save it for later?");
25

26
            System.out.print("(take or eat) -> ");
27
            String twinkieChoice = input.nextLine().toLowerCase();
28

29
            if (twinkieChoice.equals("take")) {
30
                System.out.println("You slip the Twinkie into your pocket, unsure what awaits in the darkness...\n");
31
                twinkies += 1;
32
            }
33
            else if (twinkieChoice.equals("eat")) {
34
                System.out.println("Feeling uneasy, you eat the Twinkie to keep up your strength.\n");
35
            }
36
            else {
37
                System.out.println("You leave the Twinkie untouched, feeling an ominous presence watching.\n");
38
            }
39
        }
40

41
        // Caves -----------------------------------------------------------------------------
42
        // Left -> Wolfpack
43
        // Right -> Dragon
44
        // Else -> No path chosen
45
        if (path.equals("left")) {
22 collapsed lines
46
            System.out.println("You cautiously take the left path.");
47
            System.out.println("A few steps in, you freeze as the piercing eyes of a pack of wolves emerge from the shadows.");
48
            System.out.println("The pack leader, larger and fiercer than the others, steps forward, growling softly...\n");
49

50
            System.out.print("Do you offer the pack leader your hand in peace? (yes or no) -> ");
51
            String wolfChoice = input.nextLine().toLowerCase();
52

53
            if (wolfChoice.equals("yes") && twinkies >= 1) {
54
                System.out.println("As you reach out, the wolves smell the Twinkie...");
55
                System.out.println("In a frenzy of hunger, they turn on you, and you're surrounded with no escape!\n");
56
            }
57
            else if (wolfChoice.equals("yes")) {
58
                System.out.println("The pack leader sniffs your hand and accepts you into the fold.");
59
                System.out.println("You're given a small satchel of gold as a token of their trust.");
60
                System.out.println("You settle in with the wolves, awaiting dawn as the storm howls outside...\n");
61
                gold += 5;
62
                wolfpackEnding = true;
63
            }
64
            else {
65
                System.out.println("Sensing your hesitation, the wolves close in, their teeth bared.");
66
                System.out.println("You feel their claws sink in, and everything goes black...\n");
67
            }
68
        }
69
        else if (path.equals("right")) {
70
            System.out.println("You take the right path, deeper into the damp, dark cave.");
71
            System.out.println("Suddenly, a rotten, smoky smell fills the air. A massive dragon with dull, greedy eyes looms in the shadows.");
72
            System.out.println("The dragon sniffs the air and sneers, 'Did you bring me something sweet?'");
73

74
            System.out.print("Do you offer him a treat? (yes or no) -> ");
75
            String dragonChoice = input.nextLine().toLowerCase();
76

77
            if (dragonChoice.equals("yes") && twinkies >= 1) {
78
                System.out.println("The dragon's eyes widen as he devours the Twinkie. 'Delicious!' he roars.");
79
                System.out.println("In gratitude, he hands you a pile of gold coins.\n");
80

81
                System.out.print("How much gold do you take? -> ");
82
                int goldAmount = input.nextInt();
83

84
                if (goldAmount > 0 && goldAmount <= 100) {
85
                    System.out.println("The dragon grunts approval, allowing you to take the gold...\n");
86
                    gold += goldAmount;
87
                }
88
                else if (goldAmount > 100) {
89
                    System.out.println("The dragon's eyes narrow, and he hisses, 'Greed will get you nothing.'\n");
90
                }
91
                else {
92
                    System.out.println("The dragon, impressed by your modesty, lets you take all the gold!\n");
93
                    gold += 100000;
94
                }
95

96
                dragonEnding = true;
97
            }
98
            else {
99
                System.out.println("The dragon's face darkens, and he lunges towards you!");
100
                System.out.println("His jaws close around you as everything fades to black...\n");
101
            }
102
        }
103
        else {
104

105
        }
106
    }
107
}
108
//

Task 6: Default Bad Ending

This block will execute if neither 'left' nor 'right' is chosen.

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
35 collapsed lines
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11

12
        // Prologue -----------------------------------------------------------------------------
13
        System.out.println("Your car crashes into a tree during a thunderstorm in the woods.");
14
        System.out.println("Darkness surrounds you as thunder crashes and rain pours.");
15
        System.out.println("You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.");
16
        System.out.println("Inside, you see two shadowy paths diverging deeper into the unknown...\n");
17

18
        // Convert a string to lowercase using String.toLowerCase()
19
        System.out.print("Which path do you take? (left or right) -> ");
20
        String path = input.nextLine().toLowerCase();
21

22
        if (path.equals("left") || path.equals("right")) {
23
            System.out.println("\nAs you move forward, you see something glimmering on the ground — a Hostess Twinkie.");
24
            System.out.println("Do you eat the Twinkie for sustenance, or will you save it for later?");
25

26
            System.out.print("(take or eat) -> ");
27
            String twinkieChoice = input.nextLine().toLowerCase();
28

29
            if (twinkieChoice.equals("take")) {
30
                System.out.println("You slip the Twinkie into your pocket, unsure what awaits in the darkness...\n");
31
                twinkies += 1;
32
            }
33
            else if (twinkieChoice.equals("eat")) {
34
                System.out.println("Feeling uneasy, you eat the Twinkie to keep up your strength.\n");
35
            }
36
            else {
37
                System.out.println("You leave the Twinkie untouched, feeling an ominous presence watching.\n");
38
            }
39
        }
40

41
        // Caves -----------------------------------------------------------------------------
42
        // Left -> Wolfpack
43
        // Right -> Dragon
44
        // Else -> No path chosen
45
        if (path.equals("left")) {
22 collapsed lines
46
            System.out.println("You cautiously take the left path.");
47
            System.out.println("A few steps in, you freeze as the piercing eyes of a pack of wolves emerge from the shadows.");
48
            System.out.println("The pack leader, larger and fiercer than the others, steps forward, growling softly...\n");
49

50
            System.out.print("Do you offer the pack leader your hand in peace? (yes or no) -> ");
51
            String wolfChoice = input.nextLine().toLowerCase();
52

53
            if (wolfChoice.equals("yes") && twinkies >= 1) {
54
                System.out.println("As you reach out, the wolves smell the Twinkie...");
55
                System.out.println("In a frenzy of hunger, they turn on you, and you're surrounded with no escape!\n");
56
            }
57
            else if (wolfChoice.equals("yes")) {
58
                System.out.println("The pack leader sniffs your hand and accepts you into the fold.");
59
                System.out.println("You're given a small satchel of gold as a token of their trust.");
60
                System.out.println("You settle in with the wolves, awaiting dawn as the storm howls outside...\n");
61
                gold += 5;
62
                wolfpackEnding = true;
63
            }
64
            else {
65
                System.out.println("Sensing your hesitation, the wolves close in, their teeth bared.");
66
                System.out.println("You feel their claws sink in, and everything goes black...\n");
67
            }
68
        }
69
        else if (path.equals("right")) {
32 collapsed lines
70
            System.out.println("You take the right path, deeper into the damp, dark cave.");
71
            System.out.println("Suddenly, a rotten, smoky smell fills the air. A massive dragon with dull, greedy eyes looms in the shadows.");
72
            System.out.println("The dragon sniffs the air and sneers, 'Did you bring me something sweet?'");
73

74
            System.out.print("Do you offer him a treat? (yes or no) -> ");
75
            String dragonChoice = input.nextLine().toLowerCase();
76

77
            if (dragonChoice.equals("yes") && twinkies >= 1) {
78
                System.out.println("The dragon's eyes widen as he devours the Twinkie. 'Delicious!' he roars.");
79
                System.out.println("In gratitude, he hands you a pile of gold coins.\n");
80

81
                System.out.print("How much gold do you take? -> ");
82
                int goldAmount = input.nextInt();
83

84
                if (goldAmount > 0 && goldAmount <= 100) {
85
                    System.out.println("The dragon grunts approval, allowing you to take the gold...\n");
86
                    gold += goldAmount;
87
                }
88
                else if (goldAmount > 100) {
89
                    System.out.println("The dragon's eyes narrow, and he hisses, 'Greed will get you nothing.'\n");
90
                }
91
                else {
92
                    System.out.println("The dragon, impressed by your modesty, lets you take all the gold!\n");
93
                    gold += 100000;
94
                }
95

96
                dragonEnding = true;
97
            }
98
            else {
99
                System.out.println("The dragon's face darkens, and he lunges towards you!");
100
                System.out.println("His jaws close around you as everything fades to black...\n");
101
            }
102
        }
103
        else {
104
            System.out.println("You hesitate, feeling the storm grow stronger as lightning flashes around you.");
105
            System.out.println("Suddenly, a bolt strikes nearby, and you fall to the ground, darkness closing in.\n");
106
        }
107
    }
108
}
109
//

Task 7: Epilogue

Note the win conditions.

1
import java.util.Scanner;
2

3
public class Program {
4
    public static void main(String[] args) {
102 collapsed lines
5
        // If the player beats one of the levels, set its boolean variable to true
6
        boolean wolfpackEnding = false;
7
        boolean dragonEnding = false;
8
        int gold = 0;
9
        int twinkies = 0;
10
        Scanner input = new Scanner(System.in);
11

12
        // Prologue -----------------------------------------------------------------------------
13
        System.out.println("Your car crashes into a tree during a thunderstorm in the woods.");
14
        System.out.println("Darkness surrounds you as thunder crashes and rain pours.");
15
        System.out.println("You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.");
16
        System.out.println("Inside, you see two shadowy paths diverging deeper into the unknown...\n");
17

18
        // Convert a string to lowercase using String.toLowerCase()
19
        System.out.print("Which path do you take? (left or right) -> ");
20
        String path = input.nextLine().toLowerCase();
21

22
        if (path.equals("left") || path.equals("right")) {
23
            System.out.println("\nAs you move forward, you see something glimmering on the ground — a Hostess Twinkie.");
24
            System.out.println("Do you eat the Twinkie for sustenance, or will you save it for later?");
25

26
            System.out.print("(take or eat) -> ");
27
            String twinkieChoice = input.nextLine().toLowerCase();
28

29
            if (twinkieChoice.equals("take")) {
30
                System.out.println("You slip the Twinkie into your pocket, unsure what awaits in the darkness...\n");
31
                twinkies += 1;
32
            }
33
            else if (twinkieChoice.equals("eat")) {
34
                System.out.println("Feeling uneasy, you eat the Twinkie to keep up your strength.\n");
35
            }
36
            else {
37
                System.out.println("You leave the Twinkie untouched, feeling an ominous presence watching.\n");
38
            }
39
        }
40

41
        // Caves -----------------------------------------------------------------------------
42
        // Left -> Wolfpack
43
        // Right -> Dragon
44
        // Else -> No path chosen
45
        if (path.equals("left")) {
46
            System.out.println("You cautiously take the left path.");
47
            System.out.println("A few steps in, you freeze as the piercing eyes of a pack of wolves emerge from the shadows.");
48
            System.out.println("The pack leader, larger and fiercer than the others, steps forward, growling softly...\n");
49

50
            System.out.print("Do you offer the pack leader your hand in peace? (yes or no) -> ");
51
            String wolfChoice = input.nextLine().toLowerCase();
52

53
            if (wolfChoice.equals("yes") && twinkies >= 1) {
54
                System.out.println("As you reach out, the wolves smell the Twinkie...");
55
                System.out.println("In a frenzy of hunger, they turn on you, and you're surrounded with no escape!\n");
56
            }
57
            else if (wolfChoice.equals("yes")) {
58
                System.out.println("The pack leader sniffs your hand and accepts you into the fold.");
59
                System.out.println("You're given a small satchel of gold as a token of their trust.");
60
                System.out.println("You settle in with the wolves, awaiting dawn as the storm howls outside...\n");
61
                gold += 5;
62
                wolfpackEnding = true;
63
            }
64
            else {
65
                System.out.println("Sensing your hesitation, the wolves close in, their teeth bared.");
66
                System.out.println("You feel their claws sink in, and everything goes black...\n");
67
            }
68
        }
69
        else if (path.equals("right")) {
70
            System.out.println("You take the right path, deeper into the damp, dark cave.");
71
            System.out.println("Suddenly, a rotten, smoky smell fills the air. A massive dragon with dull, greedy eyes looms in the shadows.");
72
            System.out.println("The dragon sniffs the air and sneers, 'Did you bring me something sweet?'");
73

74
            System.out.print("Do you offer him a treat? (yes or no) -> ");
75
            String dragonChoice = input.nextLine().toLowerCase();
76

77
            if (dragonChoice.equals("yes") && twinkies >= 1) {
78
                System.out.println("The dragon's eyes widen as he devours the Twinkie. 'Delicious!' he roars.");
79
                System.out.println("In gratitude, he hands you a pile of gold coins.\n");
80

81
                System.out.print("How much gold do you take? -> ");
82
                int goldAmount = input.nextInt();
83

84
                if (goldAmount > 0 && goldAmount <= 100) {
85
                    System.out.println("The dragon grunts approval, allowing you to take the gold...\n");
86
                    gold += goldAmount;
87
                }
88
                else if (goldAmount > 100) {
89
                    System.out.println("The dragon's eyes narrow, and he hisses, 'Greed will get you nothing.'\n");
90
                }
91
                else {
92
                    System.out.println("The dragon, impressed by your modesty, lets you take all the gold!\n");
93
                    gold += 100000;
94
                }
95

96
                dragonEnding = true;
97
            }
98
            else {
99
                System.out.println("The dragon's face darkens, and he lunges towards you!");
100
                System.out.println("His jaws close around you as everything fades to black...\n");
101
            }
102
        }
103
        else {
104
            System.out.println("You hesitate, feeling the storm grow stronger as lightning flashes around you.");
105
            System.out.println("Suddenly, a bolt strikes nearby, and you fall to the ground, darkness closing in.\n");
106
        }
107

108
        // Epilogue -----------------------------------------------------------------------------
109
        System.out.println("-- Ending --");
110

111
        if (wolfpackEnding) {
112
            System.out.println("By cuddling with the wolfpack, you weather out the storm.");
113
            System.out.println("Upon leaving the cave, they follow you, seeing you as the new pack leader.");
114
            System.out.println("You survived!!!");
115
        }
116
        else if (dragonEnding) {
117
            System.out.println("By tempting the dragon with a delicious Hostess snack cake, you avoid his wrath.");
118
            System.out.println("He flies you back home after the storm, but not after raiding the nearest Hostess factory.");
119
            System.out.println("You survived!!!");
120
        }
121
        else {
122
            System.out.println("Game Over!");
123
        }
124

125
        if (gold > 0) {
126
            System.out.println("You not only survived, but you found " + gold + "gold!");
127
        }
128
    }
129
}
130
//

Sample Output

Your program output should something similar to the sample output below.

Your car crashes into a tree during a thunderstorm in the woods.
Darkness surrounds you as thunder crashes and rain pours.
You spot a cave nearby, dimly lit by flashes of lightning, and run towards it for shelter.
Inside, you see two shadowy paths diverging deeper into the unknown...

Which path do you take? (left or right) -> left

As you move forward, you see something glimmering on the ground - a Hostess Twinkie.
Do you eat the Twinkie for sustenance, or will you save it for later?
(take or eat) -> take
You slip the Twinkie into your pocket, unsure what awaits in the darkness...

You cautiously take the left path.
A few steps in, you freeze as the piercing eyes of a pack of wolves emerge from the shadows.
The pack leader, larger and fiercer than the others, steps forward, growling softly...

Do you offer the pack leader your hand in peace? (yes or no) -> yes
As you reach out, the wolves smell the Twinkie...
In a frenzy of hunger, they turn on you, and you're surrounded with no escape!

-- Ending --
Game Over!

Reflection Questions

You may write your reflection answers as comments at the bottom of your code.

The lesson stressed the importance of indentation and spacing sections. In the Dungeon Crawler, you ended up with several layers of nested if/else blocks. If you had not kept your code perfectly formatted, what's a debugging mistake you may have made when writing the wolfpack or dragon sections?

Submission

Submit your activity and reflection answers to the appropriate dropbox.

Activity 2.4 Nesting Code Blocks

Introduction

Activity 2.4

Nesting Code Blocks

Topics

Nesting Code Blocks: Building Complex Logic

Demo: Confirm Account Deletion

Demo: Confirm Account Deletion

Demo: Confirm Account Deletion

Importance of Code Formatting

Importance of Code Formatting

Key Terms

Objectives

Activity Tasks

Task 1: Initialize Data

Task 2: Prologue

Task 3: Construct Selection Statements for Main Levels

Task 4: Wolfpack Level

Task 5: Dragon Level

Task 6: Default Bad Ending

Task 7: Epilogue

Sample Output

Reflection Questions

Submission

Activity Complete