**Course Title:** Mastering C#: From Fundamentals to Advanced Programming **Section Title:** Control Structures and Functions **Topic:** Write C# programs using control structures and functions to solve basic problems.(Lab topic) In this lab topic, we will put into practice the concepts learned in control structures and functions. You will learn how to write C# programs that solve basic problems using if-else statements, switch statements, loops (for, while, foreach), and methods. **Lab Exercise 1: Guessing Game** Create a console application that simulates a simple guessing game. The program should: * Generate a random number between 1 and 100 * Ask the user to guess the number * Use a loop to keep asking the user for guesses until they guess the correct number * After each guess, display a message indicating whether the guess was higher or lower than the correct number Here's an example implementation: ```csharp using System; namespace GuessingGame { class Program { static void Main(string[] args) { Random random = new Random(); int correctNumber = random.Next(1, 101); int guesses = 0; while (true) { Console.Write("Guess a number between 1 and 100: "); string input = Console.ReadLine(); int guess; if (int.TryParse(input, out guess)) { guesses++; if (guess < correctNumber) { Console.WriteLine("Too low!"); } else if (guess > correctNumber) { Console.WriteLine("Too high!"); } else { Console.WriteLine($"Congratulations! You guessed the correct number in {guesses} attempts."); break; } } else { Console.WriteLine("Invalid input. Please try again."); } } } } } ``` **Lab Exercise 2: Calculator Program** Create a console application that simulates a basic calculator. The program should: * Ask the user to input two numbers and an operation (+, -, \*, /) * Use a switch statement to determine which operation to perform * Perform the operation and display the result Here's an example implementation: ```csharp using System; namespace Calculator { class Program { static void Main(string[] args) { Console.Write("Enter the first number: "); string num1Input = Console.ReadLine(); Console.Write("Enter the operation (+, -, \*, /): "); string operation = Console.ReadLine(); Console.Write("Enter the second number: "); string num2Input = Console.ReadLine(); double num1, num2; if (double.TryParse(num1Input, out num1) && double.TryParse(num2Input, out num2)) { switch (operation) { case "+": Console.WriteLine($"{num1} + {num2} = {Add(num1, num2)}"); break; case "-": Console.WriteLine($"{num1} - {num2} = {Subtract(num1, num2)}"); break; case "*": Console.WriteLine($"{num1} * {num2} = {Multiply(num1, num2)}"); break; case "/": if (num2 != 0) { Console.WriteLine($"{num1} / {num2} = {Divide(num1, num2)}"); } else { Console.WriteLine("Cannot divide by zero!"); } break; default: Console.WriteLine("Invalid operation. Please try again."); break; } } else { Console.WriteLine("Invalid input. Please try again."); } } static double Add(double num1, double num2) => num1 + num2; static double Subtract(double num1, double num2) => num1 - num2; static double Multiply(double num1, double num2) => num1 * num2; static double Divide(double num1, double num2) => num1 / num2; } } ``` **What You've Learned:** * How to use control structures (if-else statements, switch statements, loops) to solve basic problems * How to create and use methods to perform calculations * How to handle user input and errors **Practical Takeaways:** * Use control structures to control the flow of your program * Break down complex problems into simpler, more manageable tasks * Use methods to perform calculations and reusable code * Handle user input and errors to create robust and reliable programs **Additional Resources:** * For more information on C# control structures, visit the official Microsoft documentation: [https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/control-structures](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/control-structures) * For more information on C# methods, visit the official Microsoft documentation: [https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/methods](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/methods) **Do you have any questions or need help with the examples? Leave a comment below!**