Conditional Exercises

After completing the code-along activity, work on the exercises below.

One More Question

Building from the Choose Your Path project, add an additional question to make the game a little more involved.

1. In the main.cs file, in the Main body, find the final if statement
2. Above that, use Console.WriteLine to ask another question - "You get to school. Do you stop at the water fountain?"
3. Display the options: " A. Yes" / " B. No"
4. Use Console.Write to print "> "
5. Under that, create a new string variable named choice3
6. Set the choice3 variable to Console.ReadLine()
7. Use Console.Clear() to clear the console
8. Under that, create an if structure
   • if keyword
   • Parentheses (condition)
   • Curly brackets (body)
9. For the condition (between the parentheses), check if choice3 equals "A"
10. In the body (between the curly brackets), set the health variable to health + 1
11. Also in the body of the if, display a message saying "You drink some water."
12. Under the if body (after the }), create an else if structure
    • else if keyword
    • Parentheses (condition)
    • Curly brackets (body)
13. For the else if condition, check if choice3 equals "B"
14. In the body of the else if, set the health variable to health - 1
15. Also in the body of the else if, display a message saying "You do not drink water."

Run the program again, and verify that the third question properly impacts the game!

A New Project - Chat Bot

Using conditional statements, a whole lot of things are possible.

While the definition of "artificial intelligence" may not always include simple if statements, it is certainly possible to create the illusion of intelligence using conditionals!

Create a program that can respond to a number of different chat messages.

Setup

Start by creating the new project.

1. Create a new C# Repl project
2. Name it "Chatbot"
3. In the main.cs file, in the Main body, set the text color:

    Console.ForegroundColor = ConsoleColor.Black;
   

4. Under that, set the background color:

    Console.BackgroundColor = ConsoleColor.White;
   

5. Under that, clear the console to make it a little cleaner:

    Console.Clear();
   

6. Next, use Console.WriteLine to display a message saying "Welcome to the Chatbot"
7. Under that, add an empty Console.WriteLine to make some extra space

Run the program, and verify that the message appears in the proper color.

A Question

Next, the program should ask the user a question. This can theoretically be any question.

1. Under the lowest Console.WriteLine, create another Console.WriteLine
2. Display a message with a question, like "What do you want to say?"
3. Under that, create a new string variable named answer
4. Set the answer variable to be a Console.ReadLine()

Run the program. Verify that the question appears, and it is possible to enter an answer!

A Response

Now that the user has entered an answer, it is possible to respond to that answer. The response should depend on what the user said. For example, if the user says "You talkin' to me?" the bot could say "Well I'm the only one here."

Use an if statement to create that response!

1. Under the answer variable, create an if structure
   • if keyword
   • Parentheses (condition)
   • Curly brackets (body)
2. For the condition (between the parentheses), check if the answer variable equals "You talkin' to me?"
3. In the body (between the curly brackets), add a Console.WriteLine statement
4. Make the WriteLine display a message saying "Well I'm the only one here."

Run the program again. Verify that entering the exact answer "You talkin' to me?" will make the program display the correct response!

The code should look something like this:

if (answer == "You talkin' to me?")
{
    Console.WriteLine("Well I'm the only one here.");
}

Other Responses

Using the same type of structure, it's possible to make the program respond to any message at all! Add some more if statements, each of them checking the answer value and printing a different response based on the answer. Feel free to customize the responses, or use the ones from this table:

Dynamic Colors

Instead of simply setting the colors at the beginning of the program, ask the user which colors to use!

1. At the top of the Main body, above the Console.ForegroundColor, make a new space
2. There, use Console.WriteLine to display a message: "Which text color?"
3. Under that, create a new string variable named colorAnswer
4. Set the colorAnswer variable to be Console.ReadLine()
5. Under that, create an if structure
   • if keyword
   • Parentheses
   • Curly brackets
6. For the condition (between the parentheses), check if colorAnswer is Red
7. In the body (between the curly brackets), use Console.ForegroundColor = ConsoleColor.Red to set the color

Run the program, and verify that it is possible to select "Red" as the text color!

Add additional if structures for some additional colors, like ConsoleColor.Green, ConsoleColor.Cyan, and ConsoleColor.Yellow.

Challenges

After completing these exercises, start working on the challenges.