C# Variables (Int, String)

C# Variables

Welcome to C Sharp for Kids! 🎮✨

In this tutorial, we'll learn about variables in C Sharp, which are the building blocks for storing information in your programs. We explore four main types of variables:

• Integer (int): for whole numbers like 1, 5, 200, -20
• String: for text and sentences like "Hello", "Marko", "I am 26 Years Old"
• Bool: for true/false values liek true, false
• Float: for floating-point numbers like 3.1415, 2.87

What You Will Learn

• How to create and initialize variables
• How to update variable values with simple math
• How to manipulate text with String variables
• How to see your code in action in Unity

Int Variables

Imagine you're playing a game and want to keep track of your score. You can create an int variable:

int score = 36;

To increase the score by 10 you will add the code

score = score + 10; // score is now 46

You can then display this score in the game using Unity's functions, converting the integer to a string with ToString():

// Example: updating robot name with score
World.Robot.ChangeName(score.ToString());

so finally your whole code will look like this:

int score = 36; // create new variable in the memory with initial value 36 as integer type
score = score + 10; // add 10 to current value of the score, so score is now 46

// Update robot name in the Unity Screen
World.Robot.ChangeName(score.ToString());

String Variables

You can also create a string variable to store and change the robot's name:

string name = "Robot Name";

// Adding more text to the name:
name = name + " Is Rookie!";

// And updating the robot's name in the game:
World.Robot.ChangeName(name);

Practice time!

Challenge #1

🚀 Coding Practice

In C# create variable called playerName and assign your name to it. Then print it to over the Robot head World.Robot.ChangeName function.

Changes the robot's name to your name and see the results in Unity!

💡 Solution (Click to expand)

Here's the complete solution for the exercise:

// Step 1: Create a string variable with your name
string playerName = "Alice";

// Step 2: Change the robot's name to your player name
World.Robot.ChangeName(playerName);

// Optional: You can also combine it in one line
// World.Robot.ChangeName("Alice");

// For console output (if you want to see it in the console too):
Console.WriteLine("Player name is: " + playerName);

What this code does:

1. Line 2: Creates a string variable called playerName and stores your name in it
2. Line 5: Uses the Unity function to change the robot's name to whatever is stored in playerName
3. Line 11: Prints the player name to the console (optional)

Try different variations:

• Use different names
• Try combining first and last name: string playerName = "Alice Johnson";
• Add some fun text: string playerName = "Super " + "Alice";

Need a Visual Walkthrough?

Watch the tutorial on YouTube:

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Happy Coding!
Feel free to reach out if you have any questions or need help getting started.