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Console.Write("What is your name? ");
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string name = Console.ReadLine();
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Console.WriteLine($"Nice to meet you, {name}!");

Console.Write("What is your name? ");

string name = Console.ReadLine();

string name = Console.ReadLine();

Console.WriteLine($"Nice to meet you, {name}!");

Console.Write("What is your name? ");
string name = Console.ReadLine();

Console.WriteLine($"Nice to meet you, {name}!");

What is your name? Sam [Enter]
Nice to meet you, Sam!

Console.Write("First");
Console.Write("Second");
Console.WriteLine();
Console.WriteLine("Third");
Console.WriteLine("Fourth");

FirstSecond
Third
Fourth

Console.Write("How old are you? ");
string age = Console.ReadLine();

Console.WriteLine(age);

How old are you? 16 [Enter]
16

Console.Write("How many minutes? ");
string minutesText = Console.ReadLine();
int minutes = int.Parse(minutesText);

Console.WriteLine(minutes);

Console.Write("How many minutes? ");
string minutesText = Console.ReadLine();
int minutes = int.Parse(minutesText);

Console.WriteLine(minutes);

How many minutes? 30 [Enter]
30

How many minutes? thirty [Enter]
Unhandled exception. System.FormatException:
The input string 'thirty' was not in a correct format.

string name = "Sam";
Console.WriteLine($"Hello, {name}!");

string name = "Sam";
Console.WriteLine("Hello, {name}!");

string name = "Sam";
Console.WriteLine($"Hello, {name}!");

'F' → Fullscreen

Build

Copy template-console and rename the copy 1-04-conversation. Open its Program.cs file.

Task 1: Ask and Respond

1. Replace the starter code with the program below.
2. Click the triangular Run Code play button.
3. Type your name in the terminal and press Enter.
4. Confirm that the same name appears in the response.

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Console.Write("What is your name? ");
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string name = Console.ReadLine();
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Console.WriteLine($"Nice to meet you, {name}!");

Task 2: Continue the Conversation

1. Add a second prompt asking for a favorite game.
2. Store the answer in favoriteGame.
3. Add both response statements shown below.
4. Run and answer both questions.

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Console.Write("What is your name? ");
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string name = Console.ReadLine();
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Console.Write("What is your favorite game? ");
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string favoriteGame = Console.ReadLine();
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Console.WriteLine();
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Console.WriteLine($"Nice to meet you, {name}!");
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Console.WriteLine($"I have heard good things about {favoriteGame}.");

Task 3: Ask for a Whole Number

1. Ask how many minutes the user plays in a typical week.
2. Store the keyboard input in minutesText.
3. Parse that text and store the result in the int variable minutes.
4. Display the number using an interpolated string.
5. Run and enter a whole number.

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Console.Write("What is your name? ");
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string name = Console.ReadLine();
3

4
Console.Write("What is your favorite game? ");
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string favoriteGame = Console.ReadLine();
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Console.Write("How many minutes do you play in a typical week? ");
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string minutesText = Console.ReadLine();
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int minutes = int.Parse(minutesText);
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Console.WriteLine();
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Console.WriteLine($"Nice to meet you, {name}!");
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Console.WriteLine($"I have heard good things about {favoriteGame}.");
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Console.WriteLine($"You entered {minutes} minutes.");

Task 4: Cause and Read an Exception

1. Run the program again.
2. When asked for minutes, enter thirty.
3. Find the words System.FormatException in the terminal.
4. Explain why the program compiled successfully but stopped while running.
5. Run again with a whole number and confirm that the program recovers.

Challenge (Optional): Add One More Question

• Ask one more school-appropriate question of your choice.
• Store the answer in a descriptive camel-case variable.
• Work that answer into a new interpolated response.

Same Idea, Exam Notation

The AP exam's INPUT() accepts a value directly. It does not show C#'s separate text-reading and parsing steps.

Console.WriteLine("How many minutes?");
string minutesText = Console.ReadLine();
int minutes = int.Parse(minutesText);
Console.WriteLine(minutes);

DISPLAY("How many minutes?")
minutes ← INPUT()
DISPLAY(minutes)

Checkpoint

Run the finished program and enter the example answers below. Your output should follow the same conversation pattern.

What is your name? Sam [Enter]
What is your favorite game? Minecraft [Enter]
How many minutes do you play in a typical week? 120 [Enter]

Nice to meet you, Sam!
I have heard good things about Minecraft.
You entered 120 minutes.

• The program asks three questions and waits after each one.
• The two text answers are stored in string variables.
• The minutes answer is read as text and parsed into an int.
• The response uses all three stored values.
• The program compiles without an error.

Reflection

Answer the following questions before submitting your work.

1. What happens when C# reaches Console.ReadLine()?
2. Why does the program store the minutes answer in minutesText before assigning a value to minutes?
3. Why did entering thirty cause an exception rather than a compiler error?

Submit

Submit your completed activity sheet. Keep 1-04-conversation in your workspace.

Activity Complete