String Program in C#

using System;

using System.Linq;

1)Reverse Name String  in C#

String Name="Sudam";
int Len=Name.Length-1;

while(Len>=0)
{

Console.Write(Name[Len]);

Len--;

}
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Output--madus
-----------------------------------------

2)Reverse Words of a String in C#

string s = "I Name Is Sudam";

string[] a = s.Split(' ');

int temp= a.Length - 1;

while (temp >= 0)

{

    Console.Write(a[temp] + ' ');

    temp--;

}

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Output--Sudam Is Name I
----------------------------------------

3)How to Fine count how many double letters are in a string?

int doubleLetters = 0;
string characters = "Hello";
for (int i = 0; i < characters.Length - 1; i++)
{
    if (characters[i] == characters[i + 1])
    {
        doubleLetters++;
        i++;
    }
    Console.WriteLine(doubleLetters);
}

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4]Find the second Max number in an array?

         int[] Num = new int[] { 0, 11, 2, 15, 16, 8, 16 };
        int Smallest = Num.Min();
        int Largest = Num.Max();
        foreach (int i in Num)
        {
            if(i>Smallest && i<Largest)
            {
                Smallest=i;
            }
        }
        Console.WriteLine(Smallest);
        Console.ReadLine();  

_____________________________________________________

4)Find Prime Number

bool Isprime = true;
for(int i=2;i<=50;i++)
{
    for( int j=2;j<=50;j++)
    {
        if(i!=j && i%j==0)
        {
            Isprime = false;
            break;
        }
    }
    if(Isprime)
    {
        Console.Write("\t" + i);
    }
    Isprime = true;
}

_________________________________________
6) 3 rd Hight Salary

Select Distinct(Salary) from Emp e1 where 3-1=

(select Count(Distinct(E2.salary))from Emp E2 where E2.Salary>E1.Salary))
----------------------------------------------------------------------
7) Palindrome Number

            int number = 16461;

            int remineder, sum = 0;

            int temp = number;

            while (number > 0)

            {

                remineder = number % 10;

                sum = (sum * 10) + remineder;

                number = number / 10; 

            }

            if (temp == sum)

            {

                Console.WriteLine("is Palindrome.");

            }

            else

            {

                Console.WriteLine("is not Palindrome");

            }
____________________________________________________________________

            

8) Palindrome string

            string name = "level";

            string reverse = string.Empty;

            foreach (char c in name)

            {

                reverse = c + reverse;

            }

            if (name.Equals(reverse, StringComparison.OrdinalIgnoreCase))

            {

                Console.WriteLine("is Palindrome");

            }

            else

            {

                Console.WriteLine("is not Palindrome");

            }

            

9)Missing Value in Array
Q-  int [] numArray = {2,5,9,15,20};

using System;

using System.Linq;

public class HelloWorld

{

    public static void Main(string[] args)

    {

        int[] numArray = { 2, 5, 9, 15, 20 };

        // Find the minimum and maximum values in the array

        int min = numArray.Min();

        int max = numArray.Max();

        Console.WriteLine("Missing values:");

        // Iterate through the range and check for missing values

        for (int i = min; i <= max; i++)

        {

            if (!numArray.Contains(i))

            {

                Console.WriteLine(i);

            }

        }

    }

}