Summary of Step 2 and Step 3: C# Basics

Step 2: Variables and Data Types

In Step 2, you learned about variables and data types, which allow you to store and manage information in your C# programs.

  • Variables: Containers that store information (like a name or a number). You can later use or modify this information in your program.

    • Example:
string playerName = "Alice";
int playerAge = 12;
    • In this example, playerName stores the text “Alice”, and playerAge stores the number 12.

  • Data Types: Specify the kind of data a variable can hold. Some common data types:

    • string: Used for text (e.g., "Alice").
    • int: Used for whole numbers (e.g., 12).
    • bool: Used for true/false values (e.g., true or false).
    • double: Used for decimal numbers (e.g., 3.14).

You also learned how to display these variables with Console.WriteLine(), like:

Console.WriteLine("Player Name: " + playerName);
Console.WriteLine("Player Age: " + playerAge);

Step 3: If-Statements (Making Decisions)

In Step 3, you learned about if-statements, which allow your program to make decisions based on certain conditions.

  • If-Statement: This checks if a condition is true or false, and then executes different code based on the result.

    • Example:
int age = 18;

if (age >= 18)
{
Console.WriteLine("You are old enough to drive!");
}
else
{
Console.WriteLine("You are not old enough to drive.");
}
    • This code checks if the value of age is 18 or more. If it’s true, it prints a message saying you’re old enough to drive; if not, it prints a different message.

Else If: Used when you want to check multiple conditions.

Example:

int score = 85;

if (score >= 90)
{
Console.WriteLine("You got an A!");
}
else if (score >= 80)
{
Console.WriteLine("You got a B!");
}
else
{
Console.WriteLine("You need to study more.");
}

Logical Operators: You can combine multiple conditions using logical operators like && (AND) and || (OR).

  • Example:
if (age >= 13 && age <= 19)
{
Console.WriteLine("You are a teenager.");
}

Key Takeaways:

  • Step 2 taught you how to store and display information using variables and different data types.
  • Step 3 introduced you to if-statements, which allow your program to make decisions based on certain conditions, making your programs more interactive and flexible.

Let me know when you’re ready for the next step!

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