Function Getint - C# Programming Exercise

// Importing the System namespace to access basic system functions
using System;

class Program
{
    // Main method where the program starts
    public static void Main()
    {
        // Call the GetInt function and store the returned value in the age variable
        int age = GetInt("Enter your age", 0, 150); // Get the user's age within a valid range
        Console.WriteLine("Your age is: " + age); // Output the valid age entered by the user
    }

    // Function GetInt to request an integer from the user within a specified range
    public static int GetInt(string prompt, int min, int max)
    {
        int result; // Variable to store the user's input
        while (true) // Loop indefinitely until a valid input is given
        {
            Console.Write(prompt + ": "); // Display the prompt to the user
            string input = Console.ReadLine(); // Read the user's input

            // Check if the input can be converted to an integer
            if (int.TryParse(input, out result))
            {
                // Check if the result is within the specified range
                if (result < min)
                {
                    Console.WriteLine($"Not a valid answer. Must be no less than {min}."); // Invalid if less than min
                }
                else if (result > max)
                {
                    Console.WriteLine($"Not a valid answer. Must be no more than {max}."); // Invalid if greater than max
                }
                else
                {
                    return result; // Return the valid result
                }
            }
            else
            {
                Console.WriteLine("Not a valid integer. Please enter a valid number."); // Invalid if not an integer
            }
        }
    }
}