edit

Author: kallyy7

01.CSharp Intro and Basic Syntax/CSharp Intro and Basic Syntax

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+using System;
+
+public class DebitCardNumber
+{
+    public static void Main()
+    {
+        int firstCard = int.Parse(Console.ReadLine());
+        int secondCard = int.Parse(Console.ReadLine());
+        int thirdCard = int.Parse(Console.ReadLine());
+        int fourthCard = int.Parse(Console.ReadLine());
+
+        Console.WriteLine($"{firstCard:D4} {secondCard:D4} {thirdCard:D4} {fourthCard:D4}");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/01.DebitCardNumber/DebitCardNumber.cs

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+using System;
+
+public class RectangleArea
+{
+    public static void Main()
+    {
+        double a = double.Parse(Console.ReadLine());
+        double b = double.Parse(Console.ReadLine());
+
+        double sum = a * b;
+
+        Console.WriteLine($"{sum:f2}");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/01.DebitCardNumber/Program.cs

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+using System;
+
+public class MilesToKm
+{
+    public static void Main()
+    {
+        double miles = double.Parse(Console.ReadLine());
+        double milesToKm = miles * 1.60934;
+
+        Console.WriteLine($"{milesToKm:f2}");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/02.RectangleArea/Program.cs

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+using System;
+
+public class BeverageLabels
+{
+    public static void Main()
+    {
+        string name = Console.ReadLine();
+        int volume = int.Parse(Console.ReadLine());
+        int energy = int.Parse(Console.ReadLine());
+        double sugarContent = double.Parse(Console.ReadLine());
+
+        double kcal = (volume * energy) / 100.0;
+        double sugar = (volume * sugarContent) / 100;
+
+        Console.WriteLine($"{volume}ml {name}:");
+        Console.WriteLine($"{kcal}kcal, {sugar}g sugars");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/02.RectangleArea/RectangleArea.cs

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+using System;
+
+public class CharacterStats
+{
+    public static void Main()
+    {
+        string name = Console.ReadLine();
+        int currentHealth = int.Parse(Console.ReadLine());
+        int maxHealth = int.Parse(Console.ReadLine());
+        int currentEnergy = int.Parse(Console.ReadLine());
+        int maxEnergy = int.Parse(Console.ReadLine());
+
+        Console.WriteLine($"Name: {name}");
+        Console.WriteLine("Health: |" + new string('|', currentHealth) + new string('.', maxHealth - currentHealth) + "|");
+        Console.WriteLine($"Energy: |{new string('|', currentEnergy)}{new string('.', maxEnergy - currentEnergy)}|");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/03.MilesToKm/MilesToKm.cs

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+using System;
+
+public class Greeting
+{
+    public static void Main()
+    {
+        string name = Console.ReadLine();
+
+        Console.WriteLine($"Hello, {name}!");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/03.MilesToKm/Program.cs

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+using System;
+
+public class AddTwoNumbers
+{
+    public static void Main()
+    {
+        int a = int.Parse(Console.ReadLine());
+        int b = int.Parse(Console.ReadLine());
+
+        int sum = a + b;
+
+        Console.WriteLine($"{a} + {b} = {sum}");
+    }
+}

01.CSharp Intro and Basic Syntax/Exercises/04.BeverageLabels/BeverageLabels.cs

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+using System;
+
+public class EmployeeData
+{
+    public static void Main()
+    {
+        string name = Console.ReadLine();
+        int age = int.Parse(Console.ReadLine());
+        int id = int.Parse(Console.ReadLine());
+        double salary = double.Parse(Console.ReadLine());
+
+        Console.WriteLine($"Name: {name}");
+        Console.WriteLine($"Age: {age}");
+        Console.WriteLine("Employee ID: {0:d8}", id);
+        Console.WriteLine("Salary: {0:f2}", salary);
+    }
+}