using System;

public class Program

{

    public static void Main()

    {

    //Request Input, Convert user input to int and store in iNumber

    Console.WriteLine("Input first number");

    int iNumber = Convert.ToInt32(Console.ReadLine());

​

    //If statements

    Console.WriteLine("Input number");

    int myInt1 = Convert.ToInt32(Console.ReadLine());

    Console.WriteLine("Input number");

    int myInt2 = Convert.ToInt32(Console.ReadLine());

​

    if (myInt1 > 255 || myInt2 > 255) 

    {

        Console.WriteLine("These numbers are too big!");

    }

    else

    {

    }

    //Input validation

        //Get Input

        Console.WriteLine("Please enter a whole number.");

        int intNumber;

        string strInput = Console.ReadLine();

        //Validate

        bool IsValidNumber = Int32.TryParse(strInput, out intNumber);

        if (IsValidNumber == false)

        {

            Console.WriteLine("Please enter a valid number!");

            return;

        }

        else

        {

            Console.WriteLine("Valid whole number is {0}", intNumber);

        }

//WHILE and FOR loops

    // Using while (product of first 10)

    long sum = 1;

    int number = 1;

    while (number <=10)

    {

        sum *= number;

        number++;

    }

        Console.WriteLine(sum);

    // Using for loop (product of first 10)

    long result = 1;

    int i; 

    for (i=1; i <=10; i++)

    {

        result *= i;

    }

        Console.WriteLine(result);

​

//Arrays

string[] strNames = new string[4];

​

strNames [0] = "Matt";

strNames[1] = "Ge";

strNames[2] = "Rex";

strNames[3] = "Renee";

strNames[2] = "Brad"; //Rex is overwritten 

​

Console.WriteLine(strNames.GetUpperBound(0));

//Sorting Arrays

    //Array.Sort(strNames) //simply use the function

//Length & Upperband

    //ArrayName.Length//gets the length of the array (4 in this case --> 3 indexes = 4)

    //ArrayName.GetUpperBound(dimension)

​

//Multidimensional Array (2 will suffice in this clasS)

int[,] iScores = new int[3,4]; // [3 rows, and 4 columns] 

iScores[0,2] = 98;

iScores[2,3] = 82;

Console.WriteLine("UpperBound for Row is: " + iScores.GetUpperBound(0));  //how many rows? last index of the row = row 2

Console.WriteLine("UpperBound for Column is: " + iScores.GetUpperBound(1)); //how many columns? last column = column 3

//String Properties

 string myString= "My first string.";

 int intStringSize;

 intStringSize = myString.Length;

Console.WriteLine("String Length: " + intStringSize);

//Change Case (transformation)

string xString= "My first string.";

xString= xString.ToUpper(); 

Console.WriteLine(xString); //prints ALL UPPERCASE

//Search Strings (returns T or F)

    //string.Contains(search)

    //string.StartsWith(search)

    //string.EndsWith(search)

    //string.IndexOf(search) // returns an Index 

​

//Read Parts of the String

string strEmail = "superman@indiana.edu";

string strUsername;

string strDomain;

​

strUsername = strEmail.Substring(0, 8); // returns superman

strDomain = strEmail.Substring(9,11); // returns indiana.edu - (starting index, LENGTH)

Console.WriteLine("{0},{1}",strUsername,strDomain);

​

//Replace Parts of the String

    //stringName.Replace(oldString, newString)

string strPhone = "812.212.3456"; 

strPhone = strPhone.Replace(".", "-"); // returns 812-212-3456

​

//Remove Parts of the String

    //stringName.Remove(startIndex, count)

strPhone = strPhone.Remove(0, 4); // returns 212.3456

​

//Add things to the String

    //stringName.Insert(startIndex, newString)

string phone = "8122123456";

phone = phone.Insert(3, "-");

phone = phone.Insert(7, "-"); //<- why not 6? Because we added the dash 

Console.WriteLine(phone);

    // returns 812-212-3456

​

//Combine strings (Concatenate)

string strFirstname = "Homer";

string strLastname = "Simpson";

string strFullname = strFirstname + " " + strLastname;// “Simpson, Homer”

​

//Formatting strings 

    //String.Format(format, arg1, arg2, …)

string strAreaCode, strPhonePart1, strPhonePart2;

string newphone = "812.797.9348";

strAreaCode = newphone.Substring(0, 3);

strPhonePart1 = newphone.Substring(4, 3);

strPhonePart2 = newphone.Substring(8, 4);

strPhone = String.Format("({0})-{1}-{2}", strAreaCode, strPhonePart1, strPhonePart2); // “(812)-789-3456”

Console.WriteLine(strPhone);

​

//Formatting strings - Currency

    //strInput.ToString(format);

double dblPrice = 119.99;

string strPrice;

strPrice = dblPrice.ToString("C2"); // “$119.99”

Console.WriteLine(strPrice);

//Formatting strings - Currency

    //strInput.ToString(format);

double dblPercent = .76458;

string strPercent;

strPercent = dblPercent.ToString("P1"); // “76.5 %” 1 - number of decimals

//Formatting Strings - DateTime

    //String.Format(format, arg1, …);

DateTime datToday = DateTime.Now; //DateTime.Now is the commmand to get today's date

string strShortDate, strLongDate ;

​

strShortDate = String.Format("{0:MM/dd/yyyy}", datToday); // “02/10/2022”

strLongDate = String.Format("{0:dddd, MMMM d, yyyy}", datToday);// “Thursday, February 10, 2022”    

Console.WriteLine(strShortDate);

Console.WriteLine(strLongDate);

//Insert words

//Given “Celebrating 200 year of Indiana University”

//Insert “s” after “year”.

​

string strIU = "Celebrating 200 year of Indiana University";

int yearLoc;

yearLoc = strIU.IndexOf("year");

strIU = strIU.Insert(yearLoc + 4, "s");

Console.WriteLine(strIU);   

//AVERAGE and minimum

//Average

    int totalsum = 0;

    int average = 0;

        int[] thisArray = {10,99,55,33,22,16,18};

        foreach(int num in thisArray)

        {

            //Average

            totalsum = totalsum + num;

            average = totalsum / thisArray.Length;

        }

        Console.WriteLine("The average of this array is " + average);

​

​

    }

}