Boost Your Programming Skills: C# Program for Prime Number Verification

 Boost Your Programming Skills: C# Program for Prime Number Verification
using System;
namespace PrimeNumberChecker
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Enter a number: ");
            int number = int.Parse(Console.ReadLine());
            if (IsPrime(number))
            {
                Console.WriteLine($"{number} is a prime number.");
            }
            else
            {
                Console.WriteLine($"{number} is not a prime number.");
            }
        }
        public static bool IsPrime(int number)
        {
            if (number <= 1)
                return false; // Not prime if less than or equal to 1
            if (number == 2)
                return true; // 2 is prime
            // Start checking from 2
            for (int i = 2; i * i <= number; i++)
            {
                if (number % i == 0)
                    return false; // Not prime if divisible by any i
            }
            return true; // Return true if it is prime
        }
    }
}
This program defines a function `IsPrime` that checks whether the input number is prime. It handles special cases (less than or equal to 1 and 2) and then iterates from 2 up to the square root of the number to determine primality. If the number is divisible by any integer in this range, it is not prime; otherwise, it is considered prime¹⁴. Feel free to try it out! .