using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

// I am doing Array and Loop samples in this program.       

​

//Single-dimensional array samples.

    Console.WriteLine("Single-dimensional array samples.");

    Console.WriteLine("--------------------------------------------------");    

    string[] GetText; // Declaring array: type[] arrayName. Array name here is GetText. Array type is String.

    GetText = new string[3]; //We declared an array and intilitalize it later. That's why we need to use "new" keyword. We defined here GetText array with three string elements.

​

/*Now we are adding values for the three elements.

  We can use While loop, or For loop, or simple way to add values to the elements.

   We can add values to the elements in a very basic method. First element's number is always "0". 

   So, if an array defined with three elements, the elemnet numbers are will be 0,1, and 2.

*/

    GetText[0] = " Hello world.";

    GetText[1] = " What a beautiful day today.";

    GetText[2] = " Have a wonderful day.";

​

// Now let's print out the GetText values in a simple way.

    Console.WriteLine("\nNow let's print out the GetText values in a simple way.");

    Console.WriteLine(GetText[0]);

    Console.WriteLine(GetText[1]);

    Console.WriteLine(GetText[2]);

​

    string pause = Console.ReadLine(); // I just make pause the program for the next steps.

​

// Now let's print out the GetText values by using While loop.

    Console.WriteLine("\nNow let's print out the GetText values by using While loop.");

    Console.WriteLine("--------------------------------------------------");    

    int i=0; // We will control the element's number with i variable. And don't forget, first element's number must be 0. That's why, we assigned 0 for i at the beginning.

    while(i<3)// Do the following steps as long as the value of i less than three. Which means, i will have 0,1, and 2 values.

    {

        Console.WriteLine(GetText[i]);

        i++;

    }

    pause = Console.ReadLine();// I just make pause the program for the next steps.

​

// Now let's print out the GetText values by using For loop.

    Console.WriteLine("\nNow let's print out the GetText values by using For loop.");

    Console.WriteLine("--------------------------------------------------");    

    for (int j = 0; j < 3; j++) //Value of j starts with 0. And the following steps will be done as long as the value of j less than three. Which means, j will have 0,1, and 2 values.

    {

        Console.WriteLine(GetText[j]);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

// We can also add values to the elements by using loops.

// Let's use the For loop for adding values.

    Console.WriteLine("\nNow let's add the values by using For loop.");

    Console.WriteLine("--------------------------------------------------");    

    for (int k = 0; k < 3; k++)

    {

        Console.WriteLine("Enter the Text- " + (k+1));

        GetText[k]= Console.ReadLine();

    }

//Now let's print out the GetText values by using For loop.

    for (int k = 0; k < 3; k++)

    {

        Console.WriteLine("\nYour Text- " + (k+1) + " is " + GetText[k]);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

/*Now, let's find the total number of elements in an array.

  We will use Lenght property to find out how many elements an array has.

*/

    Console.WriteLine("\nNow, let's find the total number of elements in an array.");

    Console.WriteLine("--------------------------------------------------");    

//First, we will declare an array: The declare's name is DaysOfTheWeek adn type of the array is String. 

    string[] DaysOfTheWeek = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};

​

// Now, let's print out all the values of DaysOfTheWeek array.

// To perform this request, we can use For loop and Lenght property together.

// First let's find out how many elements this array has.

    int elements= DaysOfTheWeek.Length;

​

// Now let's use the For loop and print out the values.

    Console.WriteLine("\nThe days of the week are:\n");

    for (int p=0; p<elements; p++)

    {

        Console.WriteLine(DaysOfTheWeek[p]);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

// We can have the same output without elements variable. We add DaysOfTheWeek.Length directly into For Loop.

    Console.WriteLine("\nWe can have the same output without elements variable.");

    Console.WriteLine("We add DaysOfTheWeek.Length directly into For Loop.");

    Console.WriteLine("--------------------------------------------------");    

    Console.WriteLine("\nThe days of the week are:\n");

    for (int y=0; y<DaysOfTheWeek.Length; y++)

    {

        Console.WriteLine(DaysOfTheWeek[y]);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

// Now let's use the foreach loop to print out this array's elements' values.

// foreach (Data-Type VariableName in ArrayName)

// In this sample, Data-Type is string, VariableName is Days, and ArrayName is DaysOfTheWeek.

    Console.WriteLine("\nNow let's use the foreach loop to print out this array's elements' values.");

    Console.WriteLine("foreach (Data-Type VariableName in ArrayName).");

    Console.WriteLine("--------------------------------------------------");    

    Console.WriteLine("\nThe days of the week are:\n");

    foreach (string Days in DaysOfTheWeek)

    {

        Console.WriteLine(Days);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

// Let's sort the values in an array.

// To perform this request, we will use Array.Sort() method.

// Array.Sort(ArrayName) for ascending order.

// Array.Reverse(ArrayName) for descending order.

    Console.WriteLine("\nLet's sort the values in an array. Array.Sort(ArrayName) for ascending order.");

    Console.WriteLine("--------------------------------------------------");    

// First, let's declare an array: The declare's name is Ages and type of the array is Integer.  

    int[] Ages = new int[5]; // This array has 5 elements.

​

// Now let's get inputs from the user by using for loop.

    for (int g=0;g<5;g++)

    {

        Console.WriteLine(" Please enter Student-" + (g+1) + " age.");

        Ages[g]= int.Parse(Console.ReadLine());

    }

​

// Now let's sort the students ages in ascending order.

    Array.Sort(Ages);

​

// Now let's print out the  students ages by using foreach loop.

    Console.WriteLine("Studets' ages ascending sort result is:");

    foreach (int t in Ages)

    {

        Console.WriteLine(t);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

//Now let's sort the students ages in descending order.

    Console.WriteLine("\nNow let's sort the students ages in descending order. Array.Reverse(ArrayName) for descending order.");

    Console.WriteLine("--------------------------------------------------");        

    Array.Reverse(Ages);

​

// Now let's print out the  students ages by using foreach loop.

    Console.WriteLine("Studets' ages descending sort result is:");

    foreach (int v in Ages)

    {

        Console.WriteLine(v);

    }

    pause = Console.ReadLine(); // I just make pause the program for the next steps.

/* Let's use the System.Linq namespace to use Min, Max, and Sum array methods.

    System.Linq has been added at the beginning of this program.

    ArrayName.Max() find the biggest value of the elements.

    ArrayName.Min() find the smallest value of the elements.

    ArrayName.Sum() find the total value of the elements.*/

    Console.WriteLine("\nLet's use the System.Linq namespace to use Min, Max, and Sum array methods.");

    Console.WriteLine("ArrayName.Max(),ArrayName.Min(), ArrayName.Sum()");

    Console.WriteLine("--------------------------------------------------");        

// First, let's declare an array: The declare's name is Numbers and type of the array is Integer.   

    int[] Numbers = {18, 29, 15, 44, 33, 11, 37};

    int ArrayLenght = Numbers.Length;

    string AllNumbers= Numbers[0] + ",";

    foreach (int j in Numbers)

    AllNumbers = AllNumbers + j;

​

    Console.WriteLine("Numbers in the array are:\n" + AllNumbers);

    Console.WriteLine("The maximum number is: " + Numbers.Max());                 

    Console.WriteLine("The minimum number is: " + Numbers.Min());

    Console.WriteLine("The total amount of the elements is: " + Numbers.Sum());           

/////////////////////////////////////////////////////////////////////////////////////

    }

}