Program.cs

using static System.Net.Mime.MediaTypeNames;
using static System.Runtime.InteropServices.JavaScript.JSType;

namespace Assignment_1_2
{
    internal class Program
    {

        private static double PerformArithmatic(double a, double b, string mathType)
        {
            switch (mathType)
            {
                case "add":
                    return a + b;
                case "subtract":
                    return a - b;
                case "multiply":
                    return a * b;
                case "divide":
                    if (b != 0)
                        return a / b;
                    else
                        throw new DivideByZeroException("The divisor cannot be zero.");
                default: throw new ArgumentException("Invalid math type.");
            }
        }


        static void Main(string[] args)
        {
            /* Assignment 1.2.1
             * Write a C# Sharp program to accept two integers and check whether they are equal or not.
             * Test Data :
             * Input 1st number: 5
             * Input 2nd number: 5
             * Expected Output :
             * 5 and 5 are equal
             * Test Data :
             * Input 1st number: 5
             * Input 2nd number: 15
             * Expected Output :
             * 5 and 15 are not equal */

            Console.WriteLine("Input an integer:");
            int integerOne = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("\nInput a second integer:");
            int integerTwo = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine((integerOne == integerTwo) ? $"\n{integerOne} and {integerTwo} are equal." : $"\n{integerOne} and {integerTwo} are not equal.");


            /* Assignment 1.2.2
             * Write a C# Sharp program to find the sum of first 10 natural numbers.
             * Expected Output :
             * The first 10 natural number is :
             * 1 2 3 4 5 6 7 8 9 10
             * The Sum is : 55 */

            int sum = 0;
            for (int i = 0; i < 10; i++)
                sum += i + 1;
            Console.WriteLine("\n\nThe first 10 natural numbers are:\n1 2 3 4 5 6 7 8 9 10");
            Console.WriteLine($"\nThe sum of these numbers is: {sum}");


            /* Assignment 1.2.3
             * Write a menu driven application to perform calculation functions like 
             * addition, subtraction, multiplication, and division. 
             * Call them appropriately when user selects the option. 
             * Give the user the option to continue or exit the program. */

            string? mathType;
            Console.WriteLine("\n\nThe different types of arithmatic calculations: \nadd subtract multiply divide");
            do
            {
                Console.WriteLine("\nWhat kind of math problem would you like to perform?");
                mathType = Console.ReadLine();
            }
            while (mathType != "add" && mathType != "subtract" && mathType != "multiply" && mathType != "divide");

            double sumOfMath = PerformArithmatic(integerOne, integerTwo, mathType);
            Console.WriteLine($"\n{integerOne} {mathType} {integerTwo} equals {sumOfMath}."); 
        }
    }
}