Search in array C# Exercise - C# Programming Course

using System;  // Import the System namespace for basic functionality

class Program  // Define the main class
{
    static void Main()  // The entry point of the program
    {
        // Comment with the names of both programmers
        // Programmers: [Your Name] & [Partner's Name]

        // Ask the user how many data points they want to enter
        Console.Write("How many numbers will you enter? ");
        int count = Convert.ToInt32(Console.ReadLine());  // Read and store the number of data points

        // Create an array to store the floating point numbers
        double[] numbers = new double[count];

        // Ask the user for the data and store it in the array
        Console.WriteLine("Enter the numbers:");
        for (int i = 0; i < count; i++)
        {
            Console.Write($"Enter number {i + 1}: ");  // Prompt the user for a number
            numbers[i] = Convert.ToDouble(Console.ReadLine());  // Convert the input to a double and store it in the array
        }

        // Start checking if the entered numbers exist in the list
        while (true)
        {
            Console.Write("\nEnter a number to search for (or 'end' to quit): ");
            string input = Console.ReadLine();  // Read user input

            // Check if the user wants to end the program
            if (input.ToLower() == "end")
            {
                break;  // Exit the loop if the user types "end"
            }

            // Convert the input to a double and check if it exists in the array
            double searchValue;
            bool isValid = double.TryParse(input, out searchValue);  // Check if the input can be parsed as a double

            if (isValid)
            {
                // Check if the number exists in the array
                bool found = false;
                foreach (double number in numbers)
                {
                    if (number == searchValue)
                    {
                        found = true;
                        break;
                    }
                }

                // Display whether the number is found in the array or not
                if (found)
                {
                    Console.WriteLine($"The number {searchValue} is in the list.");
                }
                else
                {
                    Console.WriteLine($"The number {searchValue} is not in the list.");
                }
            }
            else
            {
                Console.WriteLine("Invalid input. Please enter a valid number or 'end' to quit.");
            }
        }

        Console.WriteLine("Goodbye!");
    }
}