Introduction to C#

using System;

class Program
{
    static void Main()
    {
        // Console.WriteLine prints a line of text, then moves to a NEW line.
        Console.WriteLine("Hello, C# World!");      // prints: Hello, C# World!
        Console.WriteLine("Welcome to C# programming!"); // prints on its own line
        Console.WriteLine("Let's build something amazing!");

        // ✅ Expected output (three separate lines):
        //    Hello, C# World!
        //    Welcome to C# programming!
        //  
...

using System;

class Program
{
    static void Main()
    {
        // 🎯 YOUR TURN — replace each ___ then press "Try it Yourself".

        // 1) Print a greeting of your choice
        Console.WriteLine(___);   // 👉 put your text in "double quotes"

        // 2) Print your name on its own line
        Console.WriteLine(___);   // 👉 e.g. "My name is Sam"

        // ✅ Expected output (example):
        //    Hello there!
        //    My name is Sam
    }
}

using System;

class Program
{
    static void Main()
    {
        // WriteLine adds a new line at the end; Write does NOT.
        Console.WriteLine("=== Welcome to C# ===");
        Console.Write("This stays on ");          // no new line after this
        Console.WriteLine("the same line.");      // joins: This stays on the same line.

        // $"..." is string interpolation: {variable} is swapped for its value.
        string language = "C#";
        int year = 2026;
        Console.Writ
...

using System;

class Program
{
    static void Main()
    {
        // 🎯 YOUR TURN — fill in the blanks marked with ___

        string course = "C#";

        // 1) Use interpolation to print "I'm learning C# today!"
        Console.WriteLine($"I'm learning {___} today!"); // 👉 put the variable name in the braces

        // 2) Use Write (no new line) then WriteLine so both appear on ONE line
        Console.Write("Score: ");
        Console.WriteLine(___);   // 👉 print the number 100 (no qu
...

using System;

class Program
{
    static void Main()
    {
        // A variable is a named box that stores ONE type of value.
        string name = "Alice";    // text  -> always in "double quotes"
        int age = 25;             // whole number (no decimal point)
        double height = 1.68;     // decimal number
        bool isStudent = true;    // true or false (lowercase in C#)

        // Drop each variable into the text with {curly braces}.
        Console.WriteLine($"Name: {name}"); 
...