using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace generate_prime_nos
{
    class Program
    {
        static void Main(string[] args)
        {
            bool current=false;
            int j;
            Console.WriteLine("Enter a number");
            int num=Int32.Parse(Console.ReadLine());
            Console.WriteLine("The prime numbers are: ");
            for (int i = 2; i <= num; i++)
            {
                for (j = 2; j < i; j++)
                {
                    if (i % j == 0)
                    {
                        current = true;
                        break;
                    }
                }
                if (current == false)
                {
                    Console.Write("{0}", j);



                }
                else
                {
                    current = false;
                }
            }
            Console.ReadLine();

        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Reverse
{
    class Program
    {
        static void Main(string[] args)
        {
            int n,m;
            int sum = 0;
            int rev = 0;
            Console.WriteLine("Enter a number");
            n = Convert.ToInt32(Console.ReadLine());
            while(n>0)
    {
        m=n%10;
                sum += m;
                rev = rev *10 + m;
                n=n/10;
    }
    Console.WriteLine("The reverse of the number is:{0}",rev);
    Console.WriteLine("The sum of the digit is:{0}",sum);
    Console.ReadLine();
}
        }
    }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace vowel
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter any character");
            char c  = Convert.ToChar(Console.ReadLine());
                        {
                if(c=='a'||c=='A'||c=='e'||c=='E'||c=='i'||c=='I'||c=='o'||c=='O'||c=='u'||c=='U')
                {
                    Console.WriteLine("The entered character is a vowel");
                }
                else
                Console.WriteLine("The entered character is not a vowel");
                c=Convert.ToChar(Console.ReadLine());
                {
                    Console.ReadKey();
                }
            }
        }
        }
    }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace foreachloop
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = { 4, 5, 6, 1, 2, 3, -1, -2, -3, 0 };
            foreach(int i in numbers)
            {
                Console.WriteLine(i);
                Console.ReadLine();

            }
        }
    }
}


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace nestedclass1
{
    public class outer
    {
        public outer(int num)
        {
            Number = num;
        }
        public void DisplayNumber()
        {
            Console.WriteLine("The outher class Number: " + Number);
            Console.ReadLine();
        }
        public class Inner
        {
            public void DisplayNumber(outer o)
            {
                Console.WriteLine("The Inner class Number is :" + o.Number);
                Console.ReadLine();
            }
        }
        private int Number;

    }
    public class program
    {
        static void Main(string[] args)
        {
            outer o1 = new outer(100);
            o1.DisplayNumber();
            outer.Inner i1 = new outer.Inner();
            i1.DisplayNumber(o1);
        }
    }
}